Tubulanus polymorphus is a species of ribbon worm in the phylum Nemertea. It is found in the northern Atlantic Ocean and the northern Pacific Ocean. It occurs on the lower shore down to about 50 m (160 ft), on sand or gravel, under stones and among seaweed.

Tubulanus polymorphus. Retrieved January, 01 2022, from en.wikipedia.org/wiki/Tubulanus_polymorphus.