2 hillstream fishes
21Cobitidae — Cobitis biwae (Cobitinae) Scientific classification Kingdom …
22Earthworm eel — Earthworm eels Scientific classification Kingdom: Animalia Phylum: Chordata Class: Actinopterygii …
23Coldwater fish — Coldwater fish, in the context of aquariums, refers to fish species that prefer cooler water temperatures than tropical fish, typically below 20 °C (68 °F). Some examples are koi and goldfish. These species tend to grow more slowly and live… …
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