The Atlantic sailfish (Istiophorus albicans) is a species of marine fish in the family Istiophoridae of the order Istiophoriformes. It is found in the Atlantic Ocean and the Caribbean Sea, except for large areas of the central North Atlantic and the central South Atlantic, from the surface to depths of 200 m (656 ft). The Atlantic sailfish is related to the marlin. Tests in the 1920s estimated that the Atlantic sailfish was capable of short sprints of up to 111 kilometres per hour (69 mph); however, more conservative estimates of 37 to 55 kilometres per hour (23 to 34 mph) are more widely accepted. More recent studies even suggest sailfish do not exceed swimming speeds of 36 km/h (22 mph). Atlantic sailfish hunt schooling fish, such as sardines, anchovies and mackerel although they also feed on crustaceans and cephalopods. The Atlantic sailfish is a metallic blue fish with a large sail-like dorsal fin and a long and pointed bill-like snout. It is dark bluish-black on the upperparts and lighter on the sides (counter-shading), with about twenty bluish horizontal bars along the flanks; the underparts are silvery white. The tail fin is strongly forked. The fins are bluish-black and the front dorsal fin is speckled with small black spots. The bases of the anal fins are pale.
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