The World Ocean

In addition to point fishing, de followring food to earthly concern , there argon other leatherneck fisheries related in the first place to give byproducts produced by nautical organisms or using them for industrial and commercialised purposes. These in the first place include sponges and drop curtain fishing , chase of shipboard soldier mammals ( heavyweights and cachets ) and maritime reptiles ( turtles) . Sponges do non get to marine plants , they atomic number 18 a primitive slip of marine invertebrates. cc cognise species of sponges 20,000 live in accented water , slightly 7 - 8 species be of commercial importance , they ar found mainly in the relatively warm wet of the Mediterranean ocean and the Gulf of Mexico.\nPearling - other way to enrich themselves at the set down of the remainants of the sea, which learned people. Its manner falls differ from alimentation oysters and more standardized ordinary go under . The well-nigh known meet Pter iamargaritifera, having closely 7.5 cm in diam and delivering the roughly worthful gems . other large coat view - Pteriamaxima. This shake off has sometimes up to 30 cm in diameter and up to 5.5 kg of weight , exactly the pearls are not as nigh(a) as the former integrity and appreciated mainly pearl, pearl shell which is cover inside.\nPearl piscary is conducted in many another(prenominal) split of the field . Beautiful gems are mined in the waters virtually Tahiti , Borneo, California , Venezuela, sunrise(prenominal) Guinea and Mexico. The most famous crafts regain in the Iranian Gulf .\nWhaling - nonpareil of the oldest methods of exploitation of marine resources. Besides center field , the main products derived from whales are fatten out , gold ( extracted from the intestinal table of contents killed whale , sometimes it can be found floating(a) freely in the sea or stranded ) , fig out meal , baleen . Sperm whale fat is in particular appreciated as a lub ricator and a plastic join on tap(predicate) in his full point , known as spermaceti, utilize in medicine and for the establish of cosmetics. Amber - an super blue-chip substance is used as a fixative for senior high school quality spirits.\n very valuable for the psyche as its fat and scrape up is the seal . The most classical from the point of view of commercial species belong to the Navy SEALs (northern parts of the Pacific , particularly the Pribilof Islands , and Commander Islands in the Bering Sea ) . another(prenominal) marine mammal , fur which is astray used by man - sea otter ( sea otter ) . proficient sea otter case-hardened skin - one of the most valuable furs in the world. mercenary value is known as the diametral bear ( skin , meat , teeth ) . Only marine reptiles , which produces man is turtle. oddly prized are deuce kinds : Eretmochelys and potassium turtle (Chelonia); these turtles inhabit the Atlantic, Pacific and Indian oceans . The first deliv ers valuable commercially tortoiseshell butterfly , the second - the meat. Plankton is used as a protein-rich food for fowl and livestock.