1. Akera bullata. Anterior view of parasol during rapid, powerful downstroke. Animal is forced upwards and edges are rigid, presumably stiffened by muscular contraction. Seawater pond, Oban, Scotland. April 2010.
2. Akera bullata. Anterior view of parasol during rapid, powerful downstroke. Animal is forced upwards and edges are rigid, presumably stiffened by muscular contraction. Seawater pond, Oban, Scotland. April 2010.

Akera bullata. Anterior view of parasol during rapid, powerful downstroke. Animal is forced upwards and edges are rigid, presumably stiffened by muscular contraction. Seawater pond, Oban, Scotland. April 2010.