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Both sexes have 24 vertebrae, of which 11 are precaudal and 13 are caudal. [16] The marlin has two dorsal fins and two anal fins. The fins are supported by bony spines known as rays. Its first dorsal fin has 39 to 43 rays from front to back. [16] Its second dorsal fin has six or seven rays. [16]
Caudal/Tail fins: Also called the tail fins, caudal fins are attached to the end of the caudal peduncle and used for propulsion. The caudal peduncle is the narrow part of the fish's body. The hypural joint is the joint between the caudal fin and the last of the vertebrae. The hypural is often fan-shaped.
The white marlin (Tetrapterus albida/Kajikia albida), also known as Atlantic white marlin, marlin, skilligalee, [3] is a species of billfish that lives in the epipelagic zone of the tropical and subtropical Atlantic Ocean. They are found between the latitudes of 45° N and 45° S in waters deeper than 100 m.
The adipose fin is a soft, fleshy fin found on the back behind the dorsal fin and just forward of the caudal fin. It is absent in many fish families, but found in nine of the 31 euteleostean orders ( Percopsiformes , Myctophiformes , Aulopiformes , Stomiiformes , Salmoniformes , Osmeriformes , Characiformes , Siluriformes and Argentiniformes ...
The dorsal fin contains 11 spines and 14 soft rays while the anal fin has 3 spines and 8 soft rays. The caudal fin is rounded. There are 60-67 scales in the lateral line. The flanks are marked with diffuse, irregular brown bars and blotches and there are wide dark brown margins to the soft rayed part of the dorsal fin, anal fin and caudal fins.
The shape, size, position and colour of the dorsal fin varies with the type of billfish, and can be a simple way to identify a billfish species. For example, the white marlin has a dorsal fin with a curved front edge and is covered with black spots. The huge dorsal fin, or sail of the sailfish is kept retracted most of the time.
The caudal fin is strongly divided and rigid, with a slender, ridged base. The first (spiny) dorsal fin and the pelvic fins are normally retracted into body grooves. Species lengths vary from the 20 cm (7.9 in) of the island mackerel to the 4.58 m (15.0 ft) recorded for the immense Atlantic bluefin tuna .
Orange to greenish brown. Numerous orange and white dots over the flanks. Black and white dots on the pelvic, anal and caudal fins. Found in lagoons over coral rubble or sea-grass beds. Benthivorous 35 cm. Commercial fish. Common dolphinfish (Dorade) Extended body with a dorsal fin stretching from the head and stopping short of the caudal fin ...