The red-tailed black shark is a striking fish, jet black body with a vivid red tail fin. Despite the "shark" name, it is a cyprinid (carp family), not a true shark. ⚠️ Critically endangered in the wild (Chao Phraya Basin, Thailand). They are strongly territorial toward their own kind and similar-shaped fish, keep only one per tank. They will chase and stress other fish that enter their chosen territory; ensure plenty of decor and hiding spots for other fish to escape. They eat algae, plant matter, sinking pellets, and vegetables.
| Max Size | 15 cm |
| Temperature | 22–26°C |
| pH Range | 6.5–7.5 |
| Min Tank Size | 120L |
| Care Level | Intermediate |
| Origin | Thailand (critically endangered in the wild) |
⚠️ Keep only one per tank. Can be aggressive toward bottom-dwelling and mid-level fish that intrude on territory. Best in large tanks with plenty of hiding spots.
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