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Sea Hare any one marine gastropod mollusk of the genus Aplysia of the subclass Opisthobranchiata. Body length, up to 40 cm. There are two pairs of cephalic tentacles; the posterior tentacles | Table 1. Major seas |
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| Name and type | Area (sq km) | Greatest depth (m) |
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| 1Classified as seas on the basis of hydrological conditions | | PACIFIC OCEAN | | Coral Sea (semienclosed)............... | 4,791,000 | 9,140 | | South China Sea (semienclosed)............ | 3,447,000 | 5,245 | | Bering Sea (semienclosed)................ | 2,304,000 | 4,191 | | Sea of Okhotsk (semienclosed)............. | 1,583,000 | 3,372 | | Sea of Japan (semienclosed)............. | 978,000 | 3,669 | | East China Sea (semienclosed)............... | 752,000 | 2,717 | | Banda Sea (interisland)................. | 695,000 | 7,440 | | Java Sea (interisland).................. | 480,000 | 54 | | Celebes Sea (interisland)................ | 435,000 | 5,842 | | Sulu Sea (interisland).................. | 348,000 | 5,094 | | ATLANTIC OCEAN | | Caribbean Sea (semienclosed)............. | 2,754,000 | 7,680 | | Mediterrean Sea (inland)............... | 2,500,000 | 5,121 | | Gulf of Mexico1 (semienclosed)............ | 1,543,000 | 5,203 | | Hudson Bay1 (inland).................... | 819,000 | 301 | | North Sea (marginal)..................... | 544,000 | 238 | | Black Sea (inland)...................... | 420,300 | 2,211 | | Baltic Sea (inland) ........................ | 386,000 | 459 | | Sea of Azov (inland)....................... | 38,000 | 14 | | INDIAN OCEAN | | Arabian Sea (semienclosed)................ | 3,683,000 | 5,203 | | Arafura Sea (marginal).................. | 1,037,000 | 3,680 | | Red Sea (inland)......................... | 450,000 | 2,811 | | Sea of Timor (marginal)................ | 615,000 | 3,310 | | ARCTIC OCEAN | | Barents Sea (marginal).................... | 1,405,000 | 600 | | Norwegian Sea (marginal).................. | 1,383,000 | 3,921 | | Greenland Sea (marginal)................. | 1,205,000 | 4,846 | | East Siberian Sea (marginal).................. | 936,000 | 155 | | Kara Sea (marginal) ....................... | 880,000 | 620 | | Baffin Bay1 (semienclosed)................ | 689,000 | 2,136 | | Laptev Sea (marginal)..................... | 700,000 | 3,385 | | Chukchi Sea (marginal).................. | 582,000 | 160 | | Beaufort Sea (marginal)................ | 476,000 | 4,683 | | White Sea (internal).................... | 90,000 | 330 |
resemble hare’s ears. A mantle covers the thin lamellar shell. Glands in the mantle cavity secrete a poisonous pigmented fluid. The foot has lateral flaps, which serve for swimming. There are approximately 35 species. Sea hares are herbivorous and live mainly in tropical seas. Their large nerve cells are used in neuro-physiological research.
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