Tubularia is a genus of hydroids resembling furry pink tufts or balls at the end of long strings, spawning the common name as either the pink-mouthed or pink-hearted hydroid.

The average height of an individual colony is 4–6 centimetres (1+1⁄2–2+1⁄2 inches) and the diameter of the polyp and tentacles is 1 cm (1⁄2 in).

Tubularia occurs either individually or in colonies, both being dioecious and possessing large, brilliantly coloured, flowerlike hydrants.

[citation needed] During the summer, sperm are released into the water and attracted to female reproductive structures by means of a chemical substance.

[2] Tubularia indivisa may be difficult to distinguish from Ectopleura larynx, with the two often growing together.