umm not sure. ive heard a lot of bad stuff about all worms, blood worms included. theres a guy nere me who wont seel u any fish if u so much as mention the word "bloodworm"
but my lil elephants loved em, they wouldnt eat any other food. and watch out with tankmates, ive never kept any bichirs so not sure what theyre like but elephant noses can be absolute sooks sometimes, my last one got bullied to death by a BGK
anyway, theyre cool lil fishies, thats for sure
oh forgot to say, mine would only come out to feed at night and when the lights where all dim