The opposite of anadromous fish, catadromous fish live in fresh water, entering salt water to spawn. Most eels are catadromous. At least 72 species of rockfish exist off our shores. Rockfishes are often associated with a specific habitat and give birth to live young. Very young red king crabs are solitary creatures living in relatively shallow water.
Some information suggests the pods disperse at night and reform at dawn.
Podding continues until crabs are approximately four years of age when they move into deeper water to join adults. Actually tiny plant-like animals, corals gradually build the coral skeleton that shapes the reef. Slow to build, these structures can live for thousands of years. The blue whale is thought to be the largest known animal ever to have lived on sea or land. Individuals can reach more than 110 feet and weigh nearly 200 tons.