Triggerfish and filefish, which swim by rippling the dorsal and anal fins rather than with the tail. The name is the locking mechanism: the first dorsal spine raises and a second spine locks it upright, wedging the fish into a hole.
The titan triggerfish is the reason this group carries a warning. A female guarding a nest defends a cone of water above it and will charge and bite anything inside that cone, including a diver. The way out is sideways and level, not upward: swimming up keeps you in the cone.
Most of the group is far less trouble. They feed on hard things - urchins, molluscs, crabs - and the queen triggerfish is known for turning an urchin over to get at the underside.
The filefish are the same body plan built lighter, with a single long spine and a rough skin. Several are extreme specialists: the orange-spotted filefish eats Acropora coral and matches it, and the mimic filefish copies a toby, which is poisonous.
Every one has a page. They are shown as a list rather than as pictures because nothing has been photographed or logged for them yet, and a species with nothing behind it should not sit in front of one that has.
How many of the 25 carry a record at each destination. A species usually carries several, so these do not add up to 25.
All 1316 species in one index, with filters for destination, rarity and hazard.