I have couple datnoids around 4" and I want to feed them angelfish fry around nickel size will it be ok? Do I have to cut the dorsal, ventral, and the anal fin so that it would be better for them to digest or no? My friend just gave me a batch about 100 nickel size fry I don't what to do with so I want to feed to my dats, I know that dats when that grow larger they can eat crayfish so should I feed them angelfish fry?