![]() ![]() ![]() While it varies with local conditions of water-mass formation. The salinities typically range between 34 and 36 parts per thousand in the bathyal zone. Except for this place, the normal temperatures range between 5° and 15° C (that is 41° and 59° F), the western oceanic margins are warmer, this is because of the current from the equatorial region and from the eastern margins which receives colder boreal currents and also experiences upwelling. The temperatures in higher latitudes range from approximately 3° to -1° C (that is 37° to 30° F). In these tropic regions, small amounts of sunlight can penetrate deep as 600 m (2,000 feet). ![]() In the Bathyal waters, photosynthesis does not occur as the zone is being characterized as a dark zone except in the clear, virtually lifeless waters of the tropics. In this section, we will know about Bathyal Zone in detail. Both these limits are variable number, but the bathyal zone is normally described as a surface which lies between 200 and 2,000 m (that is 660 and 6,600 feet) below the surface area. The Bathyal zone is the marine ecologic realm that extends down from the continental shelf to the depth where the water temperature is 4☌ (which is 39☏). ![]()
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