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Threespot Damselfish Video Stock Footage
The adult threespot damselfish is a brownish-grey, bony fish with a dusky yellow sheen and a large black spot at the base of the pectoral fins. It grows to 13 cm in length. The large dorsal fin has 12 spines and 15-17 soft rays. The anal fin has two spines and 13-14 soft rays. Neither the pectoral nor pelvic fins have spines. Juveniles are a much brighter yellow. They have a few tiny blue spots on the head and upper body, including one on the upper iris. They have three distinctive black spots, one at the junction between the dorsal fin spines and the soft rays, one dorsally on the caudal peduncle, and a third smaller one just above the base of the pectoral fins. These tend to have a faint blue rim, and the pectoral spot is absent in very young juveniles, becoming more prominent as the juvenile grows.
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