1. a tropical marine fish with a compressed body and strong jaws, capable of locking its dorsal fin spines when threatened

Examples

• The diver watched a colorful triggerfish swim near the coral reef.
• Triggerfish are known for their aggressive behavior during breeding season.
• The aquarium’s triggerfish display featured several species from the Indo-Pacific.
• When threatened, a triggerfish can wedge itself into a crevice and lock its spines.
• The triggerfish used its powerful jaws to crush the sea urchin’s shell.
• Snorkelers should maintain distance from triggerfish, especially near their nests.