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Care library / Food

Frozen bloodworms

Frozen & live

Frozen bloodworms

Frozen whole bloodworms (midge larvae) in water with added B vitamins and vitamin C; about 95% water, crude protein min 3.2–3.5% as fed.

For: Most freshwater fish incl. bettas, cichlids, catfish, livebearers, discus, eels; also aquatic amphibians and some aquatic reptiles.

How to feed: Use as a treat, not a staple; feed only what is eaten in 30–45 seconds (Hikari), at most twice a day; remove uneaten food. Thawing: Ocean Nutrition says thawing is not recommended (drop the frozen cube in); Hikari gives no thawing instruction.

Careful: Handling bloodworms can cause allergic reactions in people: wash hands after use. Frozen Hikari product is sterilised; overfeeding causes water-quality problems; frozen/live foods can make fish refuse formulated foods.

Examples you may see in shops: Hikari Bio-Pure Frozen Blood Worms, Ocean Nutrition Frozen Bloodworm. Not endorsements.

Facts checked against sources on 16 Oct 2026. See sources

Who eats it

274 species

BettaBetta splendens

Easy6.5 cm24–28 °C

OscarAstronotus ocellatus

Moderate45.7 cm22–27 °C

Jack DempseyRocio octofasciata

Moderate25 cm22–28 °C

Green terrorAndinoacara rivulatus

Moderate20 cm20–24 °C

FrontosaCyphotilapia frontosa

Hard33 cm24–27 °C

Zebra plecoHypancistrus zebra

Moderate8 cm26–30 °C

Red tail catfishPhractocephalus hemioliopterus

Hard130 cm21–26 °C

Tiger shovelnose catfishPseudoplatystoma fasciatum

Hard100 cm22–26 °C

Silver arowanaOsteoglossum bicirrhosum

Hard90 cm24–30 °C

Alligator garAtractosteus spatula

Spotted garLepisosteus oculatus

Rainbow snakeheadChanna bleheri

Easy17 cm14–28 °C

Senegal bichirPolypterus senegalus

Moderate50 cm24–28 °C

RopefishErpetoichthys calabaricus

Moderate40 cm24–28 °C

Elephantnose fishGnathonemus petersii

Hard23 cm24–28 °C

African butterflyfishPantodon buchholzi

Moderate12 cm24–30 °C

Pea pufferCarinotetraodon travancoricus

Moderate3 cm24–28 °C

Bumblebee gobyBrachygobius doriae

Moderate3.5 cm24–28 °C

Indian glassfishChanda ranga

Easy8 cm22–28 °C

Lyretail killifishAphyosemion australe

Easy6 cm21–24 °C

Clown knifefishChitala ornata

Hard100 cm24–28 °C

Black ghost knifefishApteronotus albifrons

Moderate50 cm24–28 °C

Peacock eelMacrognathus siamensis

Moderate30 cm24–28 °C

African dwarf frogHymenochirus boettgeri

Moderate3.5 cm20–25 °C

African clawed frogXenopus laevis

Easy12 cm18–24 °C

AxolotlAmbystoma mexicanum

Moderate30 cm15–18 °C

Chinese fire-bellied newtHypselotriton orientalis

Easy8 cm15–22 °C

Paddle-tail newtPachytriton brevipes

Oriental fire-bellied toadBombina orientalis

Common musk turtleSternotherus odoratus

Eastern mud turtleKinosternon subrubrum

Mata mata turtleChelus fimbriata

Livingstoni cichlidNimbochromis livingstonii

Moderate25 cm24–28 °C

Venustus cichlidNimbochromis venustus

Moderate25 cm24–28 °C

Polystigma hapNimbochromis polystigma

Moderate23 cm24–28 °C

Malawi eye-biterDimidiochromis compressiceps

Moderate25 cm24–28 °C

Electric blue hapSciaenochromis fryeri

Moderate17 cm24–28 °C

Black pearlAltolamprologus calvus

Moderate14 cm24–27 °C

CompressicepsAltolamprologus compressiceps

Moderate12.3 cm24–27 °C

Lemairii cichlidLamprologus lemairii

Moderate25 cm24–27 °C

HeterochromisHeterochromis multidens

Rio Paraguay oscarAstronotus crassipinnis

Peacock bassCichla ocellaris

Hard74 cm24–27 °C

Pike cichlidCrenicichla lepidota

Moderate20.9 cm22–28 °C

Regan's pike cichlidWallaciia regani

Hard10.5 cm24–27 °C

Johanna's pike cichlidLugubria johanna

Moderate30 cm23–26 °C

Lugubris pike cichlidLugubria lugubris

Hard40 cm27–29 °C

Jaguar cichlidParachromis managuensis

Moderate61 cm24–30 °C

Motaguense cichlidParachromis motaguensis

Moderate30.5 cm22–28 °C

Friedrichsthal's cichlidParachromis friedrichsthalii

Moderate30 cm22–28 °C

Mayan cichlidMayaheros urophthalmus

Hard40 cm22–30 °C

Bay snookPetenia splendida

Hard50 cm26–30 °C

Red terrorMesoheros festae

Hard50 cm25–29 °C

Sultan plecoLeporacanthicus joselimai

Moderate15 cm25–27 °C

Scarlet plecoPseudacanthicus pirarara

Hard40.5 cm26–30 °C

Sunshine plecoScobinancistrus aureatus

Hard30 cm25–29 °C

King tiger plecoHypancistrus seideli

Moderate14 cm26–30 °C

Snowball plecoHypancistrus inspector

Moderate16 cm26–30 °C

Leopard cactus plecoPseudacanthicus sp. (L114)

Moderate25 cm24–30 °C

Vampire plecoLeporacanthicus galaxias

Easy25 cm22–26 °C

And 214 more in the encyclopedia.

Sources

5 facts checked with sources

What it iscorrectedBio-Pure Frozen Blood Worms - Hikari Sales USA · Petstop - Ocean Nutrition Frozen Bloodworm 100g Cube
Who it's forBio-Pure Frozen Blood Worms - Hikari Sales USA · Petstop - Ocean Nutrition Frozen Bloodworm 100g Cube · MSD Veterinary Manual - Diet for Amphibians
How to feedcorrectedBio-Pure Frozen Blood Worms - Hikari Sales USA · Petstop - Ocean Nutrition Frozen Bloodworm 100g Cube
ProductsBio-Pure Frozen Blood Worms - Hikari Sales USA · Petstop - Ocean Nutrition Frozen Bloodworm 100g Cube
SafetycorrectedBio-Pure Frozen Blood Worms - Hikari Sales USA · Petstop - Ocean Nutrition Frozen Bloodworm 100g Cube