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Sharks are found in all seas. They generally do not live in fresh water, with a few exceptions such as the bull shark and the river shark which can swim both in seawater and freshwater. [99] Sharks are common down to depths of 2,000 metres (7,000 ft), and some live even deeper, but they are almost entirely absent below 3,000 metres (10,000 ft).
A new study found that some members of an octopus species hunt cooperatively in groups with fish. Video shows octopuses punching their companion fish to keep them on task and contributing to the hunt.
Fins curl around the mantle of the octopus and aid in swimming and balance, supported by cartilage. A study in a sister species, Opisthoteuthis grimaldii, observed them using the fins to maintain a vertical position in the water relative to the mantle and sea floor. [9] They have eight arms lined with a single line of suckers.
[2] [3] Parasitological evidence suggests that Indian Ocean spinner sharks have passed through the Suez Canal into the Mediterranean Sea, becoming Lessepsian migrants. [ 8 ] The spinner shark has been reported from the ocean surface to a depth of 100 m (330 ft), though it prefers water less than 30 m (98 ft) deep, and occupies all levels of the ...
Pacific sleeper shark carcasses. The Pacific sleeper shark (Somniosus pacificus) is a sleeper shark of the family Somniosidae, measuring up to 4.4 m (14 ft) in length, although it could possibly reach lengths in excess of 7 m (23 ft). [2]
Little is known about deep sea octopus species. Scientists spotted a rare “Dumbo” octopus over 5,500 feet deep in the waters off the Hawaiian islands.. The creature, named after the Disney ...
According to Pernetti (Voyage aux iles Malouines) off the coast of Angola, a huge 8-armed octopus climbed aboard. It was so severe that the ship capsized halfway. The rest of the story is unknown. [8] In French writer Victor Hugo's novel Toilers of the Sea, an imaginary fight between the novel's main hero and an octopus takes place. Hugo also ...
The sea creatures were seen fighting off the coast of Canada. Swimmer spots ‘once in a lifetime’ sight of sea lion battling octopus, video shows Skip to main content