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Dogfish sharks have slate-grey or grey-brown skin with white dots that becomes paler (almost white) around the belly region. These sharks are characterized by teeth in upper and lower jaws similar in size; a caudal peduncle with lateral keels; the upper precaudal pit usually is present; and the caudal fin is without a subterminal notch.
The etymology of the word shark is uncertain. The most likely etymology states that the original sense of the word was that of "predator, one who preys on others" from the Dutch schurk, meaning 'villain, scoundrel' (cf. card shark, loan shark, etc.), which was later applied to the fish due to its predatory behaviour. [10]
While shark nets and drum lines share the same purpose, drum lines are more effective at targeting the three sharks that are considered most dangerous to swimmers: the bull shark, tiger shark and great white shark. [79] SMART drumlines can also be used to move sharks, which greatly reduces mortality of sharks and bycatch to less than 2%. [80]
Baked bread is safe for dogs to eat, though it isn’t the most healthy treat to share with your pet. Letting a pet consume raw dough is downright dangerous, though. Unbaked bread dough can expand ...
Many dog breeds were developed for aggressive tasks like hunting and guarding property – and they are the dogs most likely to cause harm or death. Learn which breeds are more likely to bite in ...
Tiger sharks are large species that reside in tropical and temperate waters and are among sharks most cited by the Florida Museum of Natural History in its International Shark Attack File (ISAF ...
from Hindi and Urdu: An acknowledged leader in a field, from the Mughal rulers of India like Akbar and Shah Jahan, the builder of the Taj Mahal. Maharaja from Hindi and Sanskrit: A great king. Mantra from Hindi and Sanskrit: a word or phrase used in meditation. Masala from Urdu, to refer to flavoured spices of Indian origin.
Threatened sharks are those vulnerable to endangerment in the near future. The International Union for Conservation of Nature ( IUCN ) is the world's oldest global environmental organization. [ 2 ] It evaluates threatened species, and treats threatened species not as a single category, but as a group of three categories, depending on the degree ...