Consider seawater’s awful taste a warning: It contains more salt than your cells and organs can handle. Ocean water is nearly four times saltier than the fluids in your body. Your kidneys need freshwater to flush out excess salt, so every gulp of seawater will just make you thirstier and thirstier. You’ll need to take in more freshwater than seawater to avoid dehydration and eventually death.
Although people can’t drink seawater, some marine mammals (like whales and seals) and seabirds (like gulls and albatrosses) can drink seawater. Marine mammals have super efficient kidneys, and seabirds have a special gland in their nose that removes salt from the blood.
Picture Credit : Google