original: Sea snakes occur mainly in the Indian Ocean and the southwest Pacific.
simplifications: Sea snakes live mainly in the Indian Ocean and the southwest Pacific. Sea snakes can be found in the Indian Ocean and the southwest Pacific. Sea snakes live mainly in the Indian Ocean and the southwest Pacific. Sea snakes are found mostly in the Indian Ocean and the southwest Pacific. Sea snakes are mainly in the Indian Ocean and southwest Pacific. Sea snakes are mostly found in the Indian Ocean and the southwest Pacific Ocean. Sea snakes are usually found in the Indian and southwest Pacific Ocean. Sea snakes are found in the Indian Ocean and southwest Pacific. Sea snakes are mainly found in the Indian Ocean and the southwest Pacific. Sea snakes are mainly found in the Indian Ocean and the Pacific Southwest.