Spotted Sand-diver

Found in large colonies, resting on the sand or hovering just above clean sand bottoms, darting into their burrows when threatened, over steep slopes, of coral and rocky reefs.

Sand Divers get their name because when alarmed or predators are near, they dive into the sand and swim through the sand to safety.
Males displaying filaments in the dorsal fin, which they use to keep the females and juveniles following close behind.