most of these tankmates, I've heard of.
My octotank also houses a brittlestar. aside from that I've got a few small anemones, about 1 -2cm big. but when they grow larger, I'm gonna take them out.
but how about fish tankmates? I still have a few black mollies in my tank. put them in for maturing it, but never took them out. the octo never bothered them, allthough they stayed away from his hide-out.
a friend of mine said the octo doesn't touch them because they have a bitter taste. don't know if this is true.
anyone else had success keeping octos and fish together?