Input (grade 13): Like other land animals that have adapted to life in a marine environment, sea snakes ingest considerably more salt than their terrestrial relatives through their diet and when sea water is inadvertently swallowed.
Output (grade 11): Like other land animals that have adapted to life in a marine environment, sea snakes swallow considerably more salt than their relatives living on land. They do this through their diet and when they inadvertently swallow sea water.