Sergeant Major Damselfish Abudefduf saxatilis

Sergeant Major Damselfish, Indo-Pac vaigiensis
Sergeant Major Damselfish, Atlantic saxatilis
Sergeant Major Damselfish, Atlantic saxatilis
The Sergeant Major Damselfish is native to reefs of the Atlantic Ocean, both west and east; in the west from the USA via the Caribbean and Central America to Uruguay; in the east from Portugal and the Mediterranean to West Africa including the Atlantic islands.
Sergeant Major Damselfish
Sergeant Major Damselfish
Sergeant Major Damselfish
The Sergeant Major, named after the 3 stripes of a sergeant, has 5 broad black bars on a white or offwhite body with yellow at the top. It usually grows to some 16-18cm long but can reach 23cm. Eating algae and zooplankton, they clean Green Turtles. They form shoals of hundreds, but pair up to breed, with the male darkening and guarding the nest of eggs.
Sergeant Major Damselfish
Sergeant Major Damselfish
The damsel above looks particularly dark and may be another species. There are 18 species in the Abudefduf genus (19 if the Canary Damsel is included). The Indo-Pacific Sergeant, A. vaigiensis, is native to reefs of the Red Sea and Indo-Pacific and looks similar to the Sergeant Major, as does the Pacific or Panama Sergeant Major, A. troschelii. Most others, with the theme of black bars on white, look somewhat different.