upside-down catfish
noun
1- a small freshwater catfish that habitually swims upside down, enabling it to browse on algae on the undersides of floating leaves. Native to central Congo, it is popular in aquaria倒游鲇鱼。
1.1
- Synodontis nigriventris, family Mochokidae.拉丁名Synodontis nigriventris, 歧须科。