Polyp vs Hydranth - What's the difference?

As nouns the difference between polyp and hydranth

is that polyp is polyp while hydranth is (zoology) an individual polyp of a hydroid colony.

(en noun)

(medicine) an abnormal growth protruding from a mucous membrane

(biology) a cylindrical coelenterate, such as the hydra, having a mouth surrounded with tentacles

* polypoid

* * * ----

(en noun)

(zoology) An individual polyp of a hydroid colony

*{{quote-book, 1970, Sylvan Meryl Rose, Regeneration citation

, passage=NM Stevens (1902) and Emil Godlewski (1904) described the transformation of pieces of stem to hydranths in the marine hydroid.}}