Giant Danio

• ExerciseVery high

  A powerful swimmer that needs a long tank and real swimming space.

• GroomingEasy tank upkeep

  No grooming here — steady water quality and routine tank care do it.

• Living spaceNano-tank friendly

  Happy in a small, stable, well-filtered tank.

• Owner experienceFor experienced owners

  Rewards owners who know the ropes.

• Commitment5–7 years

  Plan for a long, loving relationship.

Health to watch: Ich (white spot) · Fin rot · Skin conditions

The Giant Danio (Devario aequipinnatus) comes from fast, clear hill streams in India, Sri Lanka, Nepal and Myanmar and reaches about 10 to 12 cm, making it by far the largest commonly kept danio. Its blue-grey body is broken by irregular gold bars, and the pattern brightens noticeably when the shoal is settled and well fed. It needs swimming length above all: a tank of 200 litres or more, at least 100 cm long, at 20-26C with a pH of 6.5 to 7.8 and good flow and oxygenation. Keep a group of six or more and cover the tank, since it jumps hard. Feed flake, pellets and regular frozen or live daphnia, bloodworm and brine shrimp. It is extremely hardy, tolerates cooler water and is a good dither fish for larger cichlids. The honest caution is its speed and boldness rather than aggression: it will outrace slower tankmates to food and its constant motion stresses shy species, so it belongs with robust fish.

• How active is a Giant Danio?

  Very high. A powerful swimmer that needs a long tank and real swimming space.

• How much maintenance does a Giant Danio need?

  Easy tank upkeep. No grooming here — steady water quality and routine tank care do it.

• What tank size does a Giant Danio need?

  Nano-tank friendly. Happy in a small, stable, well-filtered tank.

• Is a Giant Danio a good fit for first-time owners?

  For experienced owners. Rewards owners who know the ropes.

• How long do Giant Danio live?

  5–7 years. Plan for a long, loving relationship.

• What health issues affect the Giant Danio?

  Keep an eye out for Ich (white spot), Fin rot, Skin conditions. These are worth raising with your vet, along with any screening they recommend.

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