What is "tubularia"

Tubularia \Tu`bu*la"ri*a\, n. [NL.] (Zo["o]l.) A genus of hydroids having large, naked, flowerlike hydranths at the summits of long, slender, usually simple, stems. The gonophores are small, and form clusters at the bases of the outer tentacles.

Tubularia is a genus of hydroids that appear to be furry pink tufts or balls at the end of long strings, thus causing them to be sometimes be called "pink-mouthed" or "pink-hearted" hydroids. Their average height is 40–60 mm and the diameter of the polyp and tentacles is 10mm. Tubularia indivisa and Tubularia larynx can be difficult to distinguish and the two often grow together. In T. larynx the stems branch while in T. indivisa they are unbranched. T. larynx is described as:

The stems are tubular, with a yellowish coloured tegument and are branched at the base. The polyp colour is pale pink through to red, and consists of a central circlet of oral tentacles surrounded by paler but larger aboral tentacles