Sea snakes can be found in warm tropical waters in the Indian and Pacific Ocean. They are one of the most venomous animals found in the oceans. While their paddle like tails give them an eel-like look, they are still air breathing reptiles. They are close relatives to cobras, and while some sea snakes have a very mild disposition and only bite when provoked (caught), others are more aggressive.
This picture is of a sea krait, a kind of primitive sea snake that still spends some time on land. Underwater, brave scuba divers who get close enough can see the snake's forked tongue barely come out. The tongue's olfactory sense is much for effective in the water. The tongue action also has the added benefit of being able to rid the body of some of the salt intake.
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