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The thresher sharks have an extreme example of this tail in which the upper lobe has evolved into a weapon for stunning prey. Bottom-dwelling sharks such as catsharks and carpet sharks have tails with long upper lobes and virtually no lower lobe. The upper lobe is held at a very low angle, which sacrifices speed for maneuverability.
The value of shark fins for shark fin soup has led to an increase in shark catches where usually only the fins are taken, while the rest of the shark is discarded, typically into the sea; health concerns about BMAA in the fins now exists regarding consumption of the soup A 4.3-metre (14 ft), 540-kilogram (1,200 lb) tiger shark caught in Kāne ...
Until that time, shark was generally an incidental catch rather than a targeted species. Flake rapidly became popular. It has a mild flavour, a soft texture that nevertheless remains well-defined after cooking, and a clean white appearance. A special advantage is that flake has no bones, because sharks are cartilaginous.
Two marine biologists share 10 shark facts for kids, as well as why shark attacks happen and why sharks are essential to human survival.
This complex primitive pattern has, however, been simplified to various degrees in the great majority of vertebrates, as bones have either fused or vanished entirely. In teleosts, only the dentary, articular, and angular bones remain. [11] Cartilaginous fish, such as sharks, do
Dave Pearson is recalling the moment an almost 10-foot bull shark took a huge chunk out of his left arm while he was out surfing in Australia in 2011 "I just got hit by something.
The bonnethead (Sphyrna tiburo), also called a bonnet shark or shovelhead, [3] is a small member of the hammerhead shark genus Sphyrna, and part of the family Sphyrnidae.It is an abundant species in the littoral zone of the North Atlantic and the Gulf of Mexico, is the only shark species known to display sexual dimorphism in the morphology of the head, and is the only shark species known to be ...
They eat other sharks, fishes, sea turtles and seabirds, as well as consume garbage including coal, tin cans, clothing and bones. They have even been documented swallowing license plates, small ...