Yes.. however inverts like hermits and shrimp are not affected by an anemones stings, unless it touches their eye (lol). My shrimp always steals my anems food, and occasionally gets zapped from what I can only assume in the eye. It rockets accoss the tank at about mach 1 and scrubs its face violently..
Fish have a natural tendency to stay away from them, unless their intention is to host.