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A seashell or sea shell, also known simply as a shell, is a hard, protective outer layer usually created by an animal or organism that lives in the sea. Most seashells are made by mollusks , such as snails , clams , and oysters to protect their soft insides. [ 1 ]
Get a daily dose of cute photos of animals like cats, dogs, and more along with animal related news stories for your daily life from AOL. ... Whale Watch: A 5-Day Unit Plan for Kids. Whales, the ...
[6] [1] Transparency and reflectivity are most important in the top 100 metres of the ocean; counterillumination is the main method from 100 metres down to 1000 metres; while camouflage becomes less important in the dark waters below 1000 metres. [6] Most animals of the open sea use at least one of these methods to camouflage themselves. [6]
Porpoises are abundant and found in a multitude of environments, including rivers (finless porpoise), coastal and shelf waters (harbour porpoise, vaquita) and open ocean (Dall's porpoise and spectacled porpoise), covering all water temperatures from tropical (Sea of Cortez, vaquita) to polar (Greenland, harbour porpoise). Porpoises feed largely ...
The rock art of First Australians is the longest continuously practiced artistic tradition in the world. These sites, found in Arnhem Land, Australia, are divided into three periods: Pre-Estuarine (c. 40,000?–6000 BC), Estuarine (c. 6000 BC–500 AD), and Fresh Water (c. 500 AD–present).
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Polynesian navigators thus employed a wide range of techniques including the use of the stars, the movement of ocean currents and wave patterns, the patterns of bioluminescence that indicated the direction in which islands were located, the air and sea interference patterns caused by islands and atolls, the flight of birds, the winds and the ...
The black seadevil family, Melanocetidae, was first proposed as a subfamily in 1878 by the American biologist Theodore Gill. [2] The only genus in the family is Melanocetus which was proposed as a monospecific genus in 1864 by the German-born British herpetologist and ichthyologist Albert Günther when he described the humpback anglerfish (M. johnsoni). [3]