The Queen Triggerfish (Balistes vetula) is a reef-dwelling triggerfish found in the Atlantic Ocean. In the eastern Atlantic it is found at Ascension, Cape Verde and Azores.
The large oval-shaped fished is so named due to its unique spines on its anterior dorsal fins which are used to lock the fish into a crevice during the night. The first spine locks and the second spine unlocks, like a trigger. This prevents predators from pulling them free or swallowing the fish.