Hydroid colonies attached to kelp frond

Hydroid colonies attached to kelp frond

Observation - Hydroid colonies attached to kelp frond . Description: Zigzag, unbranched stems arising from a basal rhizome is distinctive of this species - http://www.habitas.org.uk/marinelife/species.asp?item=D7310

Zigzag, unbranched stems arising from a basal rhizome is distinctive of this species - http://www.habitas.org.uk/marinelife/species.asp?item=D7310