1. Catriona gymnota. Length 6mm. Form with powdery distal area of cerata white only. At base of Tubularia on rocky shore exposed to strong currents, ELWS, Menai Strait, Wales. March 2011.
2. Catriona gymnota. Length 6mm. Form with powdery distal area of cerata white only. At base of Tubularia on rocky shore exposed to strong currents, ELWS, Menai Strait, Wales. March 2011.

Catriona gymnota. Length 6mm. Form with powdery distal area of cerata white only. At base of Tubularia on rocky shore exposed to strong currents, ELWS, Menai Strait, Wales. March 2011.