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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.
There are numerous species of sharks found in the Pacific Ocean; of these sharks, 36 [1] have habitat ranges throughout the coastlines and surrounding waters of California, as identified below. Identifications include common names; scientific names; the taxonomic rank, family; conservation statuses according to IUCN; and an image.
The Pacific sharpnose shark inhabits the coastal waters of the eastern tropical Pacific Ocean. They can be found from southern California to all the way to Peru (Compagno, 1984). The shark is fished commercially in the Pacific Ocean off Mexico from the Gulf of California to Puerto Madero, Chiapas.
Many sharks can contract and dilate their pupils, like humans, something no teleost fish can do. Sharks have eyelids, but they do not blink because the surrounding water cleans their eyes. To protect their eyes some species have nictitating membranes. This membrane covers the eyes while hunting and when the shark is being attacked.
[3] [6] Horn sharks hunt mainly using their sense of smell. [4] Although electroreception certainly plays a role in locating prey, this species has only 148 ampullae of Lorenzini. This is much fewer than in most other sharks, which may have over 2,000. [12]
An initiative of the Benioff Ocean Science Laboratory at the University of California, Santa Barbara, is monitoring great white sharks near California’s Padaro Beach. Sharks are congregating at ...
With his hand close to razor sharp teeth, shark expert Neil Harvey attempts tonic immobility in a large reef shark. Tonic can be induced by turning a shark upside down, but that's not the only way.
"We have to think about it in terms of the food web that's out in the ocean: Ultimately, at the very top of that cycle of life are the sharks and if we removed the sharks, smaller fish species ...