Answer: hydroids

AnswerCrossword Clue
hydroidsthe phase of a hydrozoan coelenterate that consists of polyp forms usually growing as an attached colony
hydroidsnoting or pertaining to that form of hydrozoan that is asexual and grows into branching colonies by budding
hydroidsHYDROID, a polyp (an animal with many tentacles, also POLYPE, POLYPIDE)