Haleciidae

Halecium is a genus of hydrozoans in the family Haleciidae. These marine invertebrates are found in all oceans, where they often form large colonies. ==Species== Halecium currently contains 135 confirmed species.

Haleciidae is a family of hydrozoans. Their hydroid colonies emerge from a creeping hydrorhiza and usually form upright branching colonies, although some species' colonies are stolonal. Their gonophores are typically sporosacs, growing singly or bunched into a glomulus. They remain attached to the hydroids or break off to be passively drifted away; in a few, the gonophores are naked.

species of cnidarian