Two things, I agree, I hate losing fish.
and, wow, this is pretty cool!
those subocular spines are pretty fearsome looking!
(10 years of clown loach keeping and I have never seen them raised, except in a picture, so that's why I think this is cool)
they do eat fish flesh as they get older, I read an article about breeding them somewhere (loaches.com) I think it was, fish flesh was part of the diet mentioned.