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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.
Although sharks rarely bite humans, the tiger shark is reported to be responsible for a large share of fatal shark-bite incidents, and is regarded as one of the most dangerous shark species. [61] [62] They often visit shallow reefs, harbors, and canals, creating the potential for encounter with humans. [5]
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 ...
However, a study that compared different jaw suspension types in sharks showed that this is not the case and that Squalus is quite capable of protruding its upper jaw during feeding. [ 5 ] The name comes from squalus , the Latin for shark; this word is the root for numerous words related to sharks such as squaline and scientific names for ...
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]
Tiger sharks are large species that reside in tropical and temperate waters and are among sharks most cited by the International Shark Attack File (ISAF) for unprovoked attacks on humans (Getty ...
A Bay Area photographer captures juvenile white sharks "smiling" in the warm waters of Monterey Bay. Photos: Is that shark smiling? Here's why young great whites grin at Monterey Bay's Shark Park
Sharks portal; The Squaliformes / ˌ s k w ɒ l ɪ ˈ f ɔːr m iː z / are an order of sharks that includes about 126 species in seven families.. Members of the order have two dorsal fins, which usually possess spines, they usually have a sharp head, no anal fin or nictitating membrane, and five to seven gill slits.