There are six types or species of murrelets seen in the Pacific Ocean and their range is from the waters of Baja California coast to the north of the Bering Sea. These alcid members are the Ancient Murrelet, Craveri's Murrelet, Kittlitz's Murrelet, Long-billed Murrelet, Marbled Murrelet and the Xantus's Murrelet. Murrelets are more streamline in looks than the auklets and the different murrelets species body sizes are all similar.
Some species of murrelets nest in trees whereas other species of murrelets nest in burrows. Some murrelets can be found hundreds of miles out at sea while other species live within close range of the coast.