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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 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 ...
The sandbar shark is one of the largest coastal sharks in the world, and is closely related to the dusky shark, the bignose shark, and the bull shark. Its dorsal fin is triangular and very high, and it has very long pectoral fins. Sandbar sharks usually have heavy-set bodies and rounded snouts that are shorter than the average shark's snout.
Shark fin soup is a status symbol in Asian countries and is erroneously considered healthy and full of nutrients. Scientific research has revealed, however, that high concentrations of BMAA are present in shark fins. [139] Because BMAA is a neurotoxin, consumption of shark fin soup and cartilage pills, therefore, may pose a health risk. [140]
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עַכְשׁוּב ʿak̲šûb̲, mentioned only once in the Hebrew Bible, namely Psalm 140, but manifestly alluded to in Psalm 13:3, and Romans 3:13, seems to have been one of the most highly poisonous kinds of viper, perhaps the toxicoa, also called echis arenicola or scytale of the Pyramids, very common in Syria and North Africa.