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The abyssal zone or abyssopelagic zone is a layer of the pelagic zone of the ocean. The word abyss comes from the Greek word ἄβυσσος (ábussos), meaning "bottomless". [1] At depths of 4,000–6,000 m (13,000–20,000 ft), [2] this zone remains in perpetual darkness. [3] [4] It covers 83% of the total area of the ocean and 60% of Earth's ...
Saint Helena, Ascension Island and Tristan da Cunha, as well the other uninhabited islands nearby, are a haven for wildlife in the middle of the Atlantic Ocean.The islands are or were home to much endemic flora and fauna, especially invertebrates, and many endemic fish species are found in the reef ecosystems off the islands.
An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3,000 and 6,000 metres (9,800 and 19,700 ft).Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth's surface.
Examination of a 9 m (30 ft) giant squid, the second largest cephalopod, that washed ashore in Norway in 1954 In zoology, deep-sea gigantism or abyssal gigantism is the tendency for species of deep-sea dwelling animals to be larger than their shallower-water relatives across a large taxonomic range.
The Porcupine Abyssal Plain is a vast, relatively level stretch of seabed with a depth range of 4,000 to 4,850 m (13,120 to 15,910 ft). It has a muddy floor in the abyssopelagic zone and scattered rocky abyssal hills that rise into the bathypelagic zone forming seamounts and knolls. [2]
Beyond the shallow reefs are tiny cays and islets, from which the sea bottom gradually deepens until at a depth of between 21 and 37 m (70 and 120 ft) comes "The Wall", with its plunge 2,000 m (6,000 ft) into the abyss of the Tongue of the Ocean. Four species of turtles are found in Andros' waters: loggerhead, green, hawksbill and, rarely, the ...
A 30-strong team took part in the expedition, to search for new species in the remote and unexplored areas. Micronesia has some of the deepest ocean trenches on the planet, with sheer walls often a few hundred metres from the islands' shores. These are the perfect locations for the search for new fish species.
The island and the 450 surrounding smaller islands and waters make up Isle Royale National Park. Isle Royale is 45 miles (72 km) long and 9 miles (14 km) wide, with an area of 206.73 square miles (535.4 km 2), making it the fourth-largest lake island in the world.