RONDI & TANI CHURCH / SCIENCE PHOTO LIBRARY RONDI & TANI CHURCH / SCIENCE PHOTO LIBRARY
Lamprey. CLose-up of the mouth of a Pacific lamprey (Lampetra tridentata). This primitive fish lacks jaws, instead having a circular arrangement of teeth. It is a parasite and a scavenger, attaching itself to the skin of fish and whales, and feeding on blood and flesh. The Pacific lamprey inhabits the coastal waters of the northern Pacific Ocean, from western Mexico to Japan. Adults travel up rivers to breed. Some populations have become landlocked, and have adapted to freshwater life. The Pacific lamprey may reach over 75 centimetres in length.
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