Zebra Danio (Danio rerio)

Danio rerio might be the single most studied fish on the planet, its see-through embryos and fully mapped genome make it a cornerstone model organism across genetics, cancer research, and developmental biology, work that's genuinely shaped modern medicine. None of that shows up in the tank, what you get is a fast, hardy, stripe-bodied schooler that's been a beginner staple for decades regardless of its day job in a lab. We sell these in groups of 12 or more so the school looks its best from day one.

Care level: Easy · Temperament: Peaceful, shoaling · Max size: ~2" · Min tank: 15 gal · Diet: Omnivore, flake/pellet