Rainbow Shark
Territorial bottom-dweller that needs caves and room to establish a territory.
Planning your aquarium
The library starting point is 55+ US gallons. Plan for the approximate 6-inch adult size and the species' normal activity, not just its current shop size.
The minimum group count is not a compatibility recommendation; assess temperament, sex, territory, and tankmates.
Mixed-species aquariums may need substantially more space. Tank length, adult behavior, filtration, and hiding spaces all matter.
Tank setup and behavior
- Provide bottom space, suitable substrate, and accessible hiding places.
- Break up sightlines with plants or hardscape to create distinct territories.
Territorial bottom-dweller that needs caves and room to establish a territory.
Food and feeding
Food options: Sinking pellets, Algae wafers, Frozen foods.
Use appropriately sized, complete staple foods and rotate suitable foods for variety. Feed modest portions and remove uneaten food.
Tankmate cautions in the checker
- Use caution with Corydoras Catfish: A territorial rainbow shark may chase bottom-dwelling corydoras.
These are selected rule-based cautions, not a complete compatibility assessment.