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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 ...
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 ...
Close up skeletal of fin whale flipper Whales and their relatives have a soft tissue flipper that encases most of the forelimb, and elongated digits with an increased number of phalanges. [ 9 ] Hyperphalangy is an increase in the number of phalanges beyond the plesiomorphic mammal condition of three phalanges-per-digit. [ 10 ]
A snippet of Python code with keywords highlighted in bold yellow font. The syntax of the Python programming language is the set of rules that defines how a Python program will be written and interpreted (by both the runtime system and by human readers). The Python language has many similarities to Perl, C, and Java. However, there are some ...
The Irrawaddy dolphin shares similar physical characteristics with the beluga whale, but its genetic makeup ties the Irrawaddy dolphin and the killer whale as close relatives of one another. [13] Irrawaddy dolphins have a slate blue to a slate gray color and their bodies can grow up to 180-275 centimeters in length.
The specific name acutus comes from the Latin for 'pointed' and refers to the sharply pointed dorsal fin. [4] It is traditionally placed in the genus Lagenorhynchus, but there is consistent molecular evidence that supports the Atlantic white-sided dolphin and the white-beaked dolphin as basal members of the family Delphinidae and not closely ...
There is a visible boundary between the forehead and the short, pointed beak. Both the dorsal fin and flippers are curved, the former being more pointed. The teeth are small and conical and number between 108 and 144. [20] The dusky dolphin has a distinctive colouration that resembles the Pacific white-sided dolphin.
The spinner shark resembles a larger version of the blacktip shark (C. limbatus), with a slender body, long snout, and black-marked fins. This species can be distinguished from the blacktip shark by the first dorsal fin, which has a different shape and is placed further back, and by the black tip on the anal fin (in adults only). It attains a ...