Mainly the more smaller, timid species ( firefish, gobies, blennys, and juvies, ect. ) are in the most danger of falling pray to anemones. They are easily spooked into swimming into the anemone. Tank size and tank mates matter too. The more room and less agression then the less likely it will happen but even in the wild, most meals come to anemones from spooked critters fleeing one preditor into the waiting tenticals of another. Really does not matter what type of anemone other than the size I quess.