Pterois known as lion fish

Lionfish are known for their venomous fin rays, a feature that is uncommon among marine fish in the East Coast coral reefs. Stings from Lionfish are quite painful. The potency of their venom makes them excellent predators and dangerous to fishermen and divers.
But the fish never is aggressive and never attacks, divers just have to take care to do not touch the fins, even not by mistake.