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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 ...
Dorsal fin diagram with landmarks labeled. Fins allow the sharks to be able to guide and lift themselves. Most sharks have eight fins: a pair of pectoral fins, a pair of pelvic fins, two dorsal fins, an anal fin, and a caudal fin. Pectoral fins are stiff, which enables downward movement, lift, and guidance.
The common remora (Remora remora) is a pelagic marine fish [3] belonging to the family Echeneidae.The dorsal fin, which has 22 to 26 soft rays, acts as a suction cup, creating a vacuum [4] to allow the fish to attach to larger marine animals, such as whales, dolphins, sharks, and sea turtles.
Flippers are one of the principal control surfaces of cetaceans (whales, dolphins and porpoises) due to their position in front of the center of mass, and their mobility which provides three degrees of freedom. [4] The tubercles on the flippers of humpback whales improve the hydrodynamics of the flipper at their size. Breaking up channels of ...
Shark fin. According to the Humane Society International, approximately 100 million sharks are killed each year for their fins, in an act known as shark finning. [35] After the fins are cut off, the mutilated sharks are thrown back in the water and left to die. In some countries of Asia, shark fins are a culinary delicacy, such as shark fin ...
Over the past several months, viewers have submitted videos of what appears to be a giant shark fin popping out of the water near the beaches in the Tampa Bay Area. The Florida Fish and Wildlife ...
Southern right whale dolphins can be easily distinguished from other cetacean species within their range as they are the only dolphins without dorsal fins in the Southern Hemisphere. They have streamlined and graceful bodies, a single blowhole and a short and defined beak, possessing between 39 and 50 teeth per row. [5] [6]
The rough-toothed dolphin (Steno bredanensis) is a species of dolphin that can be found in deep warm and tropical waters around the world. The species was first described by Georges Cuvier in 1823. The genus name Steno , of which this species is the only member , comes from the Greek for 'narrow', referring to the animal's beak — which is a ...