Black durgeon triggerfish

Photo: William Hull · CC BY-NC

Black durgeon triggerfish aggregate around the Stavronikita's mast and rigging in schools of up to several hundred individuals, a behavior linked to their planktivorous feeding habit: they position themselves in the mild current running past the vertical structure to intercept zooplankton. Unlike many triggerfish they are non-territorial around divers and the dense schools are a defining visual feature of the dive.