[i have crabs]

Actinodendron plumosum extends at night and some of the other hellfire anemones emerge during the day.
either way you should wear gloves or youl get a nasty sting.
books say no clownfish will associate with them but some shrimp will.
and as far as the cowfish, dont be stupid do you not remember what happens to his tail when he dips it in a regular anemone