Inhabiting the tropical waters of the Indian and Pacific oceans, sea snakes can sometimes be found swarming by the thousands. Oarlike tails help them swim and a specialized lung and valved nostrils allow them to remain submerged for up to eight hours. There are more than 50 species of sea snake, all of which are venomous. Their venom quickly immobilizes small fish and other prey; however, they are not aggressive and rarely attack humans. Almost all sea snakes are ovoviviparous, which means what? Discuss
Source: The Free Dictionary