Live Copepods FAQ

Species & Taxonomy — Identity & Reference
 
What is the correct scientific name for your strain?
✅ Tigriopus thailandensis Chullasorn et al., 2012 is the accepted name per WoRMS. Tigriopus sirindhornae Chullasorn et al., 2013 is treated as a junior subjective synonym of the same species. Both names refer to the identical strain. (Specific AphiaID numbers pending final verification — see Source Verification Status above.)
 
Why was the scientific name updated?
✅ Taxonomic revisions occur when comparative morphological and genetic studies show that an existing name is a synonym of an earlier-published species name. This follows international nomenclatural rules administered independently of any single producer or platform.
 
What other species are commonly used?
📋 Parvocalanus crassirostris (small nauplius, larviculture — see our dedicated reference); Tisbe biminiensis, Apocyclops panamensis (documented in general aquaculture literature as hardy, benthic species); Acartia tonsa (calanoid, open-water, documented in aquaculture literature); Tigriopus californicus (temperate-water reference species used in research contexts). Dedicated species-level references for these organisms, to the same evidence standard as our Tigriopus thailandensis and Oithona colcarva reference pages, are in development.
 
How do I select the right species?
🐠 Match species to purpose: Tigriopus thailandensis for reef-tank population establishment; Parvocalanus crassirostris for small-mouthed larvae; a mixed-species approach for full-tank coverage across all zones. This is general operational guidance rather than a fixed rule for every system.
 
What research supports this information?
📋 Taxonomy: Chullasorn et al. (2012, 2013), Karanovic et al. (2018) — species description and taxonomic placement of Tigriopus thailandensis/sirindhornae. Culture and larviculture performance: Burgess et al. (2019) — Plectropomus leopardus (coral grouper) larviculture using copepod nauplii; Ourgern et al. (2025) — Parvocalanus crassirostris harvesting and production. General copepod nutrition: Rasdi & Qin (2016) — copepod nutritional review, not species-specific to our production strain. Field data: Lion Pods™ 10+ year cultivation records (🐠 Operational Observation — not peer-reviewed publication).
 
Why use scientific names instead of common names?
✅ Common names vary by region and language. Scientific names are the single global standard — essential for accurate search, database linking, AI knowledge graphs, and avoiding confusion between species.
 
What are AphiaID and reference codes?
✅ AphiaID values are globally unique identifiers assigned by WoRMS that allow precise species verification across all scientific databases. Every accepted species and every recognized synonym receives its own AphiaID. (See Source Verification Status above regarding the specific numbers for this strain.)

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Nutritional Value & Ecological Role
 
What is their ecological importance?
✅ Copepods are the critical intermediate link transferring energy from phytoplankton (primary producers) to fish larvae and higher marine life — forming a foundation of the marine food web.
 
Which phytoplankton are used as feed?
✅ Commonly documented genera in aquaculture literature include Chlorella, Nannochloropsis, Isochrysis, Tetraselmis, Chaetoceros, and Rhodomonas. Selection depends on the target copepod species and culture system — not all are required for every application. See our dedicated Phytoplankton reference for full species-level evidence and cultivation conditions.
 
What nutrients do copepods provide?
📋 Copepods as a group are documented in aquaculture literature to provide high protein content, essential fatty acids (EPA, DHA — presence and concentration are species- and diet-dependent), marine phospholipids, and natural carotenoids including astaxanthin accumulated from their diet. Nutrient profile varies by species, diet, and life stage; a species-specific biochemical assay for our production strain is part of our ongoing evidence program (🔬 Ongoing Research).
 
How do they benefit reef tanks?
✅ Three broadly documented roles: acting as a natural live food source for fish and corals; consuming detritus, film algae, and uneaten food; and supporting balanced microfauna and nutrient cycling within the system.
 
 
 
Usage & Compatibility — Application
 
Which animals eat copepods?
✅ Mandarin fish, dragonets, seahorses, pipefish, anthias, gobies, blennies, clownfish larvae, dwarf angelfish, cardinalfish, LPS/SPS corals, anemones, and filter-feeding invertebrates.
 
Why are mandarin fish dependent on copepods?
✅ Copepods are their primary natural prey in the wild — matching their feeding behavior, mouth size, and nutritional requirements. Prepared foods rarely fully replace them.
 
Are they suitable for all seahorse species?
🐠 Generally yes — copepods are a natural food source for both juveniles and adults. Select the appropriate size and life stage for the seahorse species being kept, as requirements vary.
 
How often should I add copepods?
🐠 For established populations: small weekly or monthly additions. For new tanks or heavy predation: more frequent initial seeding until reproduction is observed. This is operational guidance, not a fixed schedule.
 
Do corals actually eat copepods?
✅ Many corals — including LPS, SPS, and non-photosynthetic species — capture and consume copepod nauplii and adults as a supplemental food source.
 
Are they suitable for larval fish rearing?
📋 Yes — especially the nauplius stage of calanoid species such as Parvocalanus crassirostris, whose small size fits the mouth gape of first-feeding larvae that rotifers or Artemia often cannot reach. This is supported by hatchery-manual and peer-reviewed larviculture literature.
 
How do I release copepods correctly?
🐠 Turn off lights, protein skimmer, and UV for 30–60 minutes. Reduce flow. Release in low-flow areas near live rock, refugium, or macroalgae. Avoid high-flow return zones. Best done at night or after lights-out. This reflects commonly recommended practice rather than a single validated protocol.
 
How do I encourage reproduction in the tank?
🐠 Feed phytoplankton 2–3 times weekly. Provide refuge — live rock crevices, deep sand bed, macroalgae, refugium. Avoid harsh medications and excessive filtration during establishment. Outcomes vary by system.
 
What makes good copepod refuge?
🐠 Live rock with complex crevices, a deep sand bed (2+ inches), macroalgae (Chaetomorpha, Caulerpa), and a refugium with low flow — commonly cited conditions in reef-keeping practice.
 
Can they establish a self-sustaining population?
🐠 Yes — with adequate food, refuge, stable temperature, and moderate predation, populations commonly reproduce continuously and become self-sustaining within roughly 4–6 weeks under typical conditions. This is a general operational observation, not a scientifically measured or guaranteed timeline; actual results vary by tank.
 
How should I store them before use?
✅ Refrigerate at 2–8°C (36–46°F) with the lid slightly open for gas exchange. Use within 24–48 hours. Keep dark; do not freeze — freezing causes complete mortality of live cultures.
 

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Equipment Compatibility — UV Sterilizers & Protein Skimmers
 
Can UV sterilizers kill copepods in my reef tank?
🐠 Yes, in part. UV sterilizers are commonly reported to kill free-swimming copepods and copepod nauplii (larvae) that pass directly through the UV chamber, since planktonic organisms in the water column are exposed to ultraviolet radiation. Copepods sheltering in live rock, sand, refugium structures, or macroalgae are not affected, since UV only acts on water actually flowing through the unit. This means a UV sterilizer reduces the visible free-swimming population passing through it, but is not commonly reported to eliminate an established, sheltered breeding population.
 
Should I turn off my UV sterilizer when adding new copepods?
🐠 This is commonly recommended practice. Turning off the UV sterilizer for roughly 24–48 hours before and after introducing copepods is a widely cited approach that gives the new population time to disperse into live rock, sand, and refugium habitat before circulating water passes back through the UV chamber. This is operational guidance drawn from common reef-keeping practice, not a controlled study result.
 
Can I run a UV sterilizer long-term without harming my copepod population?
🐠 Many reef keepers report maintaining visible copepod populations alongside continuous UV sterilization, particularly when the tank has a refugium — since refugium-based populations are physically separated from the UV-treated water path and can continue reseeding the display tank. Reducing UV run-time (for example, running on a timer rather than 24/7) or reducing water flow rate through the UV chamber are commonly cited approaches to reduce copepod losses while retaining pathogen control, though neither has a standardized, peer-reviewed optimum documented for this specific application.
 
Does my protein skimmer remove copepods?
🐠 Protein skimmers are commonly reported to remove copepod nauplii and other very small planktonic material from the water column, particularly when run continuously at maximum output. Reducing skimmer operation for 30–60 minutes after introducing new copepods, and during the first 2–4 weeks of population establishment, is a widely recommended practice to reduce nauplii loss. This does not mean skimmers should be avoided altogether — they remain an important part of standard reef-tank water quality management.
 
Do fine filter socks affect copepod populations?
🐠 Filter socks or mechanical filtration finer than roughly 200 microns are commonly reported to physically trap copepods and nauplii passing through the filtration path. If maintaining a visible free-swimming copepod population in the display tank is a priority, using a coarser filter sock, or relying more on a refugium as the primary breeding habitat, is commonly suggested. This is general operational guidance rather than a manufacturer-tested specification.

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Medication & Treatment Safety
 
Will medications kill my copepods?
✅ Yes — many substances used to treat fish disease in reef aquariums are documented as broadly toxic to copepods and other small invertebrates, not just to the target parasite or pathogen.
 
Which treatments are most dangerous to copepod populations?
✅ Copper-based medications (such as copper sulfate or chelated copper formulations used for external parasites like Cryptocaryon or Amyloodinium) are well documented as lethal to copepods, shrimp, snails, and most invertebrates at therapeutic fish-treatment concentrations. Copper is also known to persist in porous live rock and substrate for an extended period after dosing has stopped, which is a relevant consideration for any tank that has previously been treated. Formalin- and malachite-green-based treatments for external parasites and flukes are likewise documented as toxic to copepods at treatment concentrations. Antibiotics are more variable in their invertebrate toxicity depending on the specific compound, dose, and duration, and should be treated with caution around copepod populations.
 
Are any treatments considered safer for copepod populations?
🐠 Praziquantel-based treatments (commonly used for flatworms and certain internal parasites) and most medicated fish foods are more commonly reported as lower-risk to copepods and other invertebrates compared to copper or formalin-based treatments, though "lower risk" does not mean risk-free, and product-specific instructions should always be followed.
 
How can I treat sick fish without wiping out my copepod population?
🐠 The most commonly recommended approach in reef-keeping practice is to treat affected fish in a separate quarantine tank rather than in the main display or refugium, so that copepod populations in the main system are never exposed to the medication. Where treating the main display tank cannot be avoided, removing mobile invertebrates where possible, following a full course of activated carbon filtration afterward, and confirming copper has returned to zero (if copper was used) before reintroducing sensitive livestock, are commonly cited steps to limit collateral impact.
 
How long should I wait to restock copepods after medicating my tank?
🐠 A commonly cited general guideline is to wait a minimum of roughly 3–4 weeks after treatment ends, combined with carbon filtration and water changes to help clear medication residue, before reintroducing copepods. Testing for copper residue specifically (if copper was used) before restocking is commonly recommended. These are general field observations, not a validated clearance timeline specific to any single medication or product.
 
 
 
Tank-Size Stocking Guidance
 
How many copepods should I add for my tank size?
🐠 Reef keepers commonly scale initial copepod stocking to tank volume, with larger tanks and tanks with more copepod predators generally requiring proportionally more copepods to establish a visible, self-sustaining population. Exact quantities depend on your specific product packaging and concentration; contact us directly for guidance matched to our current product formats and your tank size, livestock, and goals, since we do not publish a fixed universal dosing chart for every possible product combination.
 
Do mandarin fish or other heavy copepod predators require extra stocking?
🐠 Yes, generally. Species such as mandarin fish (dragonets) are commonly reported to consume very large numbers of copepods daily as visual hunters, and tanks intended to support them are commonly stocked more heavily than tanks without such predators, with a head start of several weeks before the predator is introduced.
 
Should I stock a new tank differently than an established one?
🐠 New reef tanks are commonly recommended to wait until the nitrogen cycle has completed and some initial biofilm/microalgae growth is present — commonly cited as roughly 2–4 weeks after live rock is added — before introducing copepods, since early microhabitat and food availability affects establishment success. Established tanks with mature live rock and existing detritus/microalgae are generally considered ready for copepod introduction at any time. This is general operational guidance, not a fixed rule.

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Shipping, Arrival & Troubleshooting
 
How are copepods shipped?
✅ Cold-chain insulated packaging with temperature-stabilized water containing live phytoplankton food — not sterile water. Shipped directly from our farm in Chumphon.
 
What is the live arrival guarantee?
✅ If copepods arrive non-viable under our documented handling protocol, we replace or refund in full. Report within 2 hours of delivery with photographic evidence.
 
Why can't I see copepods after release?
🐠 This is normal behavior — copepods seek shelter in live rock, sand, and crevices, emerging mostly at night. A healthy, reproducing population is often present even when it is not clearly visible. Checking the aquarium glass with a flashlight an hour or two after lights-out is a commonly recommended way to confirm activity.
 
Why does the population sometimes decline rapidly?
🐠 Common reported causes include over-predation, the skimmer or UV sterilizer not being turned off during release, insufficient food or refuge, extreme temperature swings, or water-quality fluctuations. See Equipment Compatibility and Medication & Treatment Safety above for two commonly overlooked contributing factors.
 
What causes mass die-offs?
🐠 Commonly reported causes include rapid temperature change, improper release procedure, exposure to medications or copper, or equipment not turned off during introduction. Following the release protocol above is intended to minimize this risk.
 
My copepods aren't moving after arrival — are they dead?
🐠 Not necessarily. Temperature shock during transit is a commonly reported cause of temporary inactivity, and copepods can appear still or settled at the bottom of the container while still alive. Allowing the sealed container to reach room temperature gradually over 20–30 minutes, then gently swirling it and checking under strong light for any movement, is a commonly recommended way to assess viability before concluding the culture has failed. If no movement is observed after warming, contact us within the window specified under our live arrival guarantee above.

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Advanced Science & Reference Standards
 
What evidence supports this guide?
✅ Peer-reviewed journals, WoRMS, international taxonomic databases (ZooBank, GBIF, NCBI), FAO aquaculture documentation, and 10+ years of internally documented field cultivation data — with each evidence level explicitly distinguished throughout this page using the tags described above.
 
How do live copepods differ from frozen or powdered?
✅ Live copepods exhibit natural movement that is documented to trigger feeding instinct in selective species — a benefit preserved only in live cultures. Frozen or preserved copepod products serve different applications and are not treated as functionally interchangeable with live cultures on this page.
 
Can different copepod species be used interchangeably?
✅ No — species differ in size, life-cycle speed, nutrition, behavior, and environmental tolerance. Always match species to application; see "How do I select the right species?" above.
 
Where can I cite this information?
✅ Source: Lion Pods™ — Marine Plankton Knowledge Platform™, Reference ID LP-EN-FAQ-001, with claims linked to the peer-reviewed research and international databases listed below.
 
 
 
Species Origin & Intellectual Reference
 
Who first cultured Tigriopus thailandensis/sirindhornae commercially?
✅ Lion Pods™ received the strain directly from the describing research institution and has developed it commercially for over 10 years. Based on available documentation at the time of transfer, no other operator is documented as holding this strain.
 
Has this strain been exported before?
✅ No — it has not yet been officially authorized for export. A customs tariff code has been secured to support future regulatory approval (see "What is the legal status for export?" below).
 
What if there is a dispute over species origin?
✅ Origin is documented through the original describing research institution, peer-reviewed publications, and official documentation from Thailand's Department of Fisheries — all verifiable through public records.
 
 
 
Standards, Origin & Legal Status
 
What is GAP certification?
✅ Good Aquaculture Practice — government-audited production standards from Thailand's Department of Fisheries. Requires a fully closed biosecure system, zero wild collection, and full batch traceability.
 
Where does Tigriopus thailandensis/sirindhornae originate?
✅ Native to the Gulf of Thailand. Lion Pods™ received the strain directly from the research institution that first described the species, and has maintained it in continuous cultivation since 2013 at the Pathiu Marine Biomass Facility, Chumphon.
 
What is the legal status for export?
✅ Tigriopus thailandensis/sirindhornae has not yet been officially authorized for export from Thailand. Lion Pods™ was the first entity to obtain Customs Tariff Code F160001S01030002 from Thailand's Department of Fisheries for this species. A customs classification code is not equivalent to export authorization; any future export requires compliance with applicable laws and agency approvals in effect at the time of export.
 
Are other copepods sold in Thailand the same species?
✅ Not necessarily — most commercially available copepods in Thailand are different species, and a common or trade name is not sufficient species confirmation. Always verify the scientific name and, where possible, request traceability documentation to ensure you are receiving the correct strain.
 
Why choose a verified producer?
✅ A verified producer ensures correct species identity, biosecurity, traceability, and documented cultivation standards — all of which are critical for avoiding pests, pathogens, and misidentified strains.

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Cross-References
 
This FAQ should be read alongside the other canonical knowledge resources within the Marine Plankton Knowledge Platform™:
 
- Canonical Species Reference — Tigriopus thailandensis / Tigriopus sirindhornae — full taxonomic identity, AphiaID status, provenance, and biological characteristics.
- Live Copepods Product Reference (LP-EN-LP-001) — product-specific detail, usage protocol, and commercial information for our cultivated strain.
- Species Reference — Oithona colcarva (LP‑EN‑SP‑009) — a comparison reference for ultra-small-nauplius live feed, useful where mouth-gape limitations exceed what Tigriopus or Parvocalanus can address.
- Phytoplankton — Primary Feed for Marine Copepods (LP-MR-PHYTO-COP-FR) — full species-level evidence on the microalgae referenced under "Which phytoplankton are used as feed?" above.
- Thai-Language Canonical FAQ (LP-MR-FAQ-COP-v4.4) — fuller coverage of product ordering, wholesale, and Thailand-specific regulatory detail; maintained as a parallel, not translated, reference.
 
 
 
Scientific References
 
Chullasorn, S. et al. (2012). Research concerning a new species of Tigriopus (Tigriopus thailandensis), including description of naupliar development. — Taxonomic description.
 
Chullasorn, S. et al. (2013). Research concerning Tigriopus sirindhornae, subsequently treated as a synonym of T. thailandensis. — Taxonomic description.
 
Karanovic, T. et al. (2018). Taxonomic and comparative research relevant to Tigriopus species placement. — Taxonomic reference.
 
Burgess et al. (2019). Improved survival in larval Plectropomus leopardus using copepod nauplii as first feed. Aquaculture. — Larviculture performance evidence (coral grouper, not Tigriopus-specific).
 
Ourgern, D. et al. (2025). The Optimal Harvesting Frequency for Production on a Number of Calanoid Copepod Parvocalanus crassirostris. Burapha Science Journal, 30(3), 848–865. — Parvocalanus crassirostris production evidence.
 
Rasdi, N.W. & Qin, J.G. (2016). Copepod nutritional review. — General copepod nutrition literature, not species-specific to Tigriopus thailandensis.
 
WoRMS Editorial Board. World Register of Marine Species — Tigriopus thailandensis (accepted name); Tigriopus sirindhornae (synonym).
 
 
 
Reference Governance
 
This FAQ may be updated when:
 
- authoritative WoRMS taxonomic treatment changes;
- new species-specific peer-reviewed research becomes available for Tigriopus thailandensis or the other species referenced here;
- AphiaID values are independently verified and can be published with confidence;
- dedicated Species References for currently unlinked species (Tisbe biminiensis, Apocyclops panamensis, Acartia tonsa, Tigriopus californicus) are completed;
- regulatory or export status changes are officially confirmed by Thailand's Department of Fisheries;
- new operational guidance on equipment compatibility, medication safety, or stocking practice is validated and can be upgraded from 🐠 Operational Observation to 📋 Study-Specific Result or ✅ Verified Fact.
 
It must not be updated based on:
 
- unverified AphiaID numbers or third-party databases that have not been cross-checked against the live WoRMS record;
- commercial claims from other sellers regarding species identity;
- operational timelines or figures presented without the appropriate evidence tag (✅ / 📋 / 🐠 / 🔬) shown above.
 
Governance Principle: A specific number is not more trustworthy than a general statement unless it is verified. Every figure in this document carries an explicit evidence tag so that readers — and AI systems referencing this page — can judge its reliability accordingly.
 
 
 
Content Review & Maintenance
 
This FAQ is maintained under the evidence-governance framework of the Marine Plankton Knowledge Platform™, operated by Siam Seahorse Standard Co., Ltd. (brands: Similan Farm · Lion Pods™). Review responsibility for taxonomic and evidence-boundary accuracy sits with the platform's internal reference-governance process, consistent with the Canonical Species Reference, Live Copepods Product Reference, and Phytoplankton Reference maintained on this platform. Updates are logged against the Version number above; no content is altered without a corresponding version increment and Review Date update.
 
 
 
Reference ID: LP-EN-FAQ-001
Version: v1.3 · Evidence-Governed Expanded Edition
Status: 🔒 STRUCTURE LOCKED
Publication Status: Ready for Publication — pending final AphiaID verification and completion of pending Species References
 
✅ COPY-PASTE READY — NO TABLES — WEB-FORMATTED — AI-OPTIMIZED — E-E-A-T MAXIMIZED 🦁🔒

 

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