Live fish food is available from specialty aquarium stores, online retailers, aquaculture suppliers, and local hobbyist groups. The best sources depend on what type of live food you need. Brine shrimp, blackworms, daphnia, and wingless fruit flies are the most commonly sold varieties, and you can find them through online retailers like AquaBid, specialty suppliers like Brine Shrimp Direct, or through local fish club sales. Many types of live food can also be cultured at home, which reduces cost and ensures a steady supply.
This guide covers the main types of live fish food that are sold, where to find them, how to evaluate quality, and which species benefit most from each type.
Why Live Food Makes a Difference
Frozen and prepared foods are convenient and nutritionally adequate for most fish. But live food offers things those formats can't replicate. The movement triggers a predatory feeding response in fish that won't reliably strike at pellets or flakes. For conditioning breeding pairs, live food provides a pre-spawning nutritional boost that often jumpstarts spawning behavior in cichlids, tetras, killifish, and marine species.
For picky eaters like pipefish, mandarin dragonets, and some wild-caught fish, live food may be the only thing they'll accept at first, at least until you wean them onto prepared foods over several weeks.
Live food also eliminates the risk of fish consuming uneaten food that degrades water quality. Live prey moves, attracts attention, and gets eaten rather than settling to the bottom.
Types of Live Fish Food Available for Sale
Brine Shrimp (Artemia)
Brine shrimp are the most widely available and versatile live food. Adult brine shrimp are sold by many online retailers and local fish stores. They're appropriate for mid-sized to large fish. Newly hatched brine shrimp nauplii (baby brine shrimp) are a critical first food for fry and small fish.
Brine Shrimp Direct is one of the largest online suppliers and sells both adult brine shrimp and cysts (eggs) for hatching your own nauplii. A 1-pound container of San Francisco Bay Brand brine shrimp cysts hatches millions of nauplii within 24 hours, which is more cost-effective than buying hatched nauplii directly.
Blackworms
Live California blackworms (Lumbriculus variegatus) are a high-protein food that many hobbyists consider the gold standard for conditioning fish. They stay alive in cool water for weeks if maintained properly, and virtually every aquarium fish that encounters them will eat them. Blackworms are sold in portions (usually by weight) and are available from aquarium retailers and specialty live food suppliers.
AquaBid regularly has blackworm sellers, and local aquarium societies often sell them at meetings. They're not as shelf-stable as frozen alternatives but the feeding response they produce is unmatched.
Daphnia
Daphnia (water fleas) are tiny crustaceans that serve as an excellent food for small fish, fry, and fish that need a high-fiber diet for digestive health. They're sold live by specialty suppliers and can be cultured easily in a bucket with green water (microalgae). Wild daphnia cultures are available from hobbyist sellers on AquaBid and in aquarium club groups.
For online purchase, Daphnia Depot and various aquaculture suppliers carry starter cultures that let you establish your own home colony.
Wingless Fruit Flies (Drosophila)
Flightless or wingless fruit flies (Drosophila melanogaster or D. Hydei) are the live food of choice for surface-feeding fish like bettas, killifish, and small rainbowfish. They're sold as cultures rather than individual flies. You buy a container of live culture with flies, pupae, larvae, and food medium, and it produces hundreds to thousands of flies over several weeks.
Josh's Frogs and a number of Amazon sellers offer fruit fly culture kits. You need a minimum of two cultures going at once to have a steady supply, since a single culture peaks and then declines.
Feeder Fish (Rosy Reds and Goldfish)
Feeder goldfish and rosy red minnows are sold at most pet stores. They're primarily used for large predatory fish, arowana, and large cichlids. There are significant drawbacks to feeder fish as a regular diet. They're often kept in crowded, disease-prone conditions and can introduce parasites and pathogens into your tank. If you use feeder fish, quarantine them for 2 to 4 weeks first, or use captive-bred options from cleaner sources.
Rosy reds (a feeder variety of fathead minnow) from Aquatic Arts or similar quality suppliers are a better bet than the $0.10 feeder goldfish from the big box store, which frequently carry internal parasites.
For buying high-quality fish food and supplies, the Best Online Fish Supply Store guide reviews suppliers that carry live food alongside equipment.
Where to Buy Live Fish Food Online
AquaBid
AquaBid.com is a live aquatic animal auction site used by hobbyists and small breeders. You can find live blackworms, daphnia cultures, vinegar eels, grindal worms, and other specialty live foods at competitive prices. Quality varies by seller, so check feedback ratings before buying.
Brine Shrimp Direct
Brine Shrimp Direct (brineshrimpdiect.com) sells adult brine shrimp, cysts for hatching nauplii, spirulina-enriched brine shrimp, and related products. Their bulk cyst pricing is particularly good for people who hatch large volumes of nauplii regularly.
LRS (Larry's Reef Services)
LRS is primarily known for premium frozen reef foods but also supplies live copepods and amphipods, which are critical for mandarin dragonets and other obligate live-food marine fish.
Live Copepods for Marine Fish
Copepods are tiny crustaceans that form the base of marine food chains. They're sold live by several marine specialty retailers. AlgaeBarn and Reef2Reef marketplace sellers regularly ship live copepod cultures. A 16-ounce bottle contains tens of thousands of pods in mixed life stages. For mandarin dragonets and finicky reef fish, maintaining a refugium with a steady copepod culture is the sustainable long-term strategy.
For managing the oxygen levels needed to keep live food (and your fish) healthy, the Best Oxygen Machine for Fish Tank Price article covers aeration equipment.
Culturing Your Own Live Food
Buying live food regularly adds up quickly. Most hobbyists who rely on live food heavily find it more economical to maintain at least one or two home cultures.
Vinegar Eels
Vinegar eels (Turbatrix aceti) are nematodes that live in apple cider vinegar. They're one of the smallest live foods available and an excellent first food for micro fry from egg-scattering fish. A starter culture costs a few dollars and lasts indefinitely with minimal attention. Add fresh apple cider vinegar and raw apple slices periodically to keep it going.
Grindal Worms
Grindal worms (Enchytraeus buchholzi) are a size step up from micro worms and a step down from white worms. They thrive at room temperature in a plastic container with a coco coir substrate and oatmeal or white bread as food. Harvest by placing food on top of the substrate and collecting the worms that congregate on the surface.
Micro Worms
Micro worms (Panagrellus redivivus) culture in oatmeal or rice-flour medium and are a slightly smaller option than grindal worms. They wriggle actively on the surface of the medium, making them easy to harvest with a fingertip or brush for feeding fry.
Nutritional Considerations
Not all live food is nutritionally complete. Brine shrimp, particularly adult brine shrimp, are high in protein but low in omega-3 fatty acids unless enriched. Enriching adult brine shrimp with Selcon, Nori algae paste, or commercial enrichment products like Dan's Feed or Omega One enrichment before feeding significantly improves their nutritional value.
Blackworms and tubifex worms are protein-rich but should not be the sole diet for most fish. The variety principle applies to fish just as it does to other animals. Rotating between two or three live food types, supplemented with quality frozen and prepared foods, produces the best results for fish health and color.
FAQ
Where can I find live blackworms locally? Many independent aquarium stores carry blackworms in their live food section. Call ahead since stock varies. Local aquarium clubs and aquatic societies are another consistent source. Some aquarists who culture blackworms sell small portions through Facebook groups and local classified listings.
How long does live brine shrimp stay alive after purchase? Adult brine shrimp in a well-aerated container of saltwater (specific gravity around 1.018 to 1.022) live for several days to a few weeks. They need aeration to survive in quantity, since they naturally live in oxygen-poor environments but expire quickly in stagnant storage water. Change the water and re-aerate daily for the best survival rates.
Can I buy live copepods at a pet store? Most general pet stores don't stock live copepods. You'll typically need to order from an online reef specialty supplier or connect with a local reef club where members often share copepod cultures. Some aquarium stores that specialize in saltwater fish keep live pod cultures in-store.
Is live food necessary or just a luxury for most fish? For most community freshwater fish, live food is a beneficial supplement but not a necessity. For species like mandarin dragonets, many wild-caught fish, and fish being conditioned for breeding, live food shifts from "nice to have" to much more important. Observe your fish's feeding response to judge whether live food would benefit them.
Conclusion
The best approach for sourcing live fish food is a combination of direct online purchasing from specialty suppliers for types you use occasionally, and maintaining home cultures for the staples you use most frequently. Blackworm cultures, brine shrimp nauplii hatching, and vinegar eel cultures are all straightforward and cost a fraction of buying live food continuously. Start with the food type your fish will most benefit from, establish a culture, and build from there.