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The humpback dolphin is a coastal species found from Africa and India south to Australia, with variations in different regions. It has a distinctive hump in front of its dorsal fin and a keel on its belly. The dorsal fin is somewhat curved. Its pectoral fins are relatively small, and the tail flukes have a noticeable notch in the middle.
The humpback smooth-hound is streamlined in many different aspects. First being that the humpback smooth-hound has a almost completely cylindrical body allowing the animal to dive through the water. The shape of the primary dorsal fin reduces friction drag in the water, allowing the animal to move without exerting as much energy.
Males, in particular, can have distinct humps under their dorsal fins. [3] They can also be distinguished by a robust body with a well-defined rostrum. They are typically slate gray on the back and sides, fading to light gray ventrally. The dorsal fin is small, slightly falcate, and triangular, and sits on a distinctive and well developed ...
The dorsal fin is short, triangular in shape, and lacks the dorsal "hump" typical of Atlantic and Indian humpback dolphins. The body is mainly dark gray in color, with flanks shading to the light gray. A diagonal cape line extending from just above the eye and neck down to the urogenital area separates the dark back and lighter belly. White ...
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Naso brachycentron has 4 or 5 spines and between 28 and 30 soft rays supporting the dorsal fin while the anal fin is supported by 2 spines and 27 or 28 soft rays. The depth of the body fits into its standard length between 2.2 and 2.7 times. In fish with a standard length greater than about 20 cm (7.9 in) a hump begins to develop in the back so ...
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. [4] The huge dorsal fin, or sail, of the sailfish is kept retracted most of the time. Sailfish ...
The humpback chub (Gila cypha) is a federally protected fish that lived originally in fast waters of the Colorado River system in the United States.This species takes its name from the prominent hump between the head and dorsal fin, which is thought to direct the flow of water over the body and help maintain body position in the swift currents of the Colorado river.