Stomatopods: the smashers, which break shells with a club, and the spearers, which take fish with a barbed strike. Both strike faster than the eye follows.
The two kinds are found in different places. The peacock mantis is a daylight animal at the mouth of its burrow and will carry its eggs to the entrance; the zebra mantis is a pair of eyes at the top of a hole up to a metre deep on open sand, and shows itself mostly at dusk and after dark.
The strike is the reason for the hazard note, not any tendency to use it on a diver. A large smasher can break a camera port, and the injury on record is to a hand put where the animal could reach it. Left alone they withdraw.
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 5 carry a record at each destination. A species usually carries several, so these do not add up to 5.
All 1316 species in one index, with filters for destination, rarity and hazard.