Ancistrus is a genus of nocturnal freshwater fish in the family Loricariidae of order Siluriformes, native to freshwater habitats in South America and Panama.
| Family | Loricariidae |
| Origin | Amazon, rapid-flowing tributaries |
| Social | Peaceful, suitable for large community tank |
| Tank Level | Bottom dweller |
| Minimum Tank Size | 40 gallon |
| Diet | Herbivore |
| Breeding | Egglayer |
| Care | Easy to Intermediate |
| pH | 5.8 to 7.8 |
| Hardness | 2 to 30 dGH |
| Temperature | 73 to 81 F (23 to 27 C) |