Manubrium and bulbs usually orange, the circular canal is sometimes red.
Found in the Barents Sea.
Neritic, boreal species.
Hydroid - Corymorpha nana Alder.
Umbrella with thick walls, especially near the top end. Manubrium thick, does not extend beyond the velum. Has only one well-developed tentacle on a large bulb, the other 3 bulbs are much smaller and lack tentacles. Ocelli absent.
Height up to 4.5 mm, width up to 3.5 mm.
