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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. [12]
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. [80] SMART drumlines can also be used to move sharks, which greatly reduces mortality of sharks and bycatch to less than 2%. [81]
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 ...
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 ...
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]
Here are the toxic plants you should keep away from your pup, including houseplants and landscape plants.
Antifreeze* is very dangerous to dogs and causes central nervous system depression and acute kidney injury. Treatment needs to be within eight hours of ingestion to be successful. [174] See Ethylene glycol poisoning. Mouse and rat poison* ingestion is common in dogs. Most rodenticides in the United States are anticoagulant by depleting vitamin ...