The Alien Amphibian appeared in 2001 movie called Evolution. A rat-sized aquatic amphibianoid creature with slippery brown skin, seal like arms and legs, a pudding shaped body, a long streamlined tadpole like tail and a otter like head with small sunken currant black eyes, a bumpy beak like nose, a bald swollen forehead and sharp boar like teeth that evolved presumably from the flatworms and managed to escape the cave system, invading the nearby lake.