1. Akera bullata. Contracts into spheroid when alarmed, and may give off purple or white fluid. In soakaway pond of marine aquarium, Oban, Scotland. April 2010.
2. Akera bullata. Contracts into spheroid when alarmed, and may give off purple or white fluid. In soakaway pond of marine aquarium, Oban, Scotland. April 2010.

Akera bullata. Contracts into spheroid when alarmed, and may give off purple or white fluid. In soakaway pond of marine aquarium, Oban, Scotland. April 2010.