The same fish?

[CatLover]

Are rainbow sharks (aka red-finned sharks), and red-tailed black sharks the same thing? Or are they different species?

 

[BigC]

They have the same family name but they are a different species..Red Tailed Black Shark (Epalzeorhyncus bicolor) tends to get aggressive with age so do not mix with Red Finned Shark (Epalzeorhyncus frenatum).

 

[CatLover]

Thanks!
Btw, cute fish in your avatar

 

[BigC]

Yeah it's a form of killifish from Gabon. I'm a Killi nut and this is my favourite. (Diapteron Georgiae) difficult to breed and rear though.