Ron Shimek said:In contrast to the other large beneficial fire worms found in our tanks, one species decidedly presents problems for a reef aquarium. This species, Hermodice carunculata , is a fire worm species commonly found in the Caribbean, although other species in the same genus are found throughout the tropics. It is the only potential “problem” fire worm in aquaria because it eats stony corals and gorgonians in its natural habitat, but may also prey on soft corals in the aquarium. As with all fire worms, this species has no jaws to bite off chunks of food, rather it must lick them to death.
Ron Shimek said:When a predator, or an unwary aquarist, tries to pick up a fire worm, the bristles pierce its flesh, break, and release the venom, which functions as an irritant. While the irritation to humans is typically mildly irritating, it may be significantly painful in sensitive individuals. If you need to hand these worms it is best to use forceps, or where gloves.