Modern crocodiles inhabit different bodies of fresh water . Relatively few species tolerate brackish water and estuaries found in river ( uzkoryly African crocodile, Nile crocodile , American crocodile ostroryly , caiman crocodile ) . Only estuarine crocodile swims in the open sea ( met at a distance of 600 km from the nearest land ) .Most of the day crocodiles carried out in water .
Crocodiles usually drift , continuing to breathe : the head is held horizontally below the surface , the nostrils and eyes exposed to air , and the body is inclined , dropping to the tail ( or almost vertical) . Crocodiles can permanently dive ( Mississippi alligator - up to 2 hours). Morning and late afternoon crocodiles go to the coastal shallows - warm in the sun . Most favorable for the life of the body temperature in Mississippi alligator - 32 -35o C and 38o C above the temperature lethal for this species. The lower threshold of activity - about 20o. On land , crocodiles often lie with wide open mouth , which is apparently due to the regulators : some heat transfer occurs when water evaporates from the mucous membranes of the mouth . Metabolic mechanisms of heat can increase the body temperature by a few degrees crocodile above ambient temperature .
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