The manubrium, gonads and bulbs are dark red in color; ocelli are black.
Is found in the Barents Sea, White Sea, Kara Sea, and Bering Sea.
Neritic, cold-water species.
Hydroid Bougainvillia superciliaris Hartlaub.
Umbrella almost ball-shaped, with very thick walls. Radial canals very wide. Bulbs are half-sickle in shape, rarely have more than 15 highly contractible tentacles. The base of each tentacle carries large ocelli on the inner side. Gastric stem is well developed. Manubrium is cube-shaped; carries 4 mouth lobes, which divide dichotomically up to 4-5 times.
4 gonads are located above the mouth lobes.
