Actinodendron arboreum (Quoy & Gaimard, 1833)
Found associated with: Cirsotrema cf multiperforata, C. varicosum.

Photograph by: A. Gittenberger

Characterization (by Bas Kokshoorn): Oral disc 10-20 cm in diameter, with coloured stripes radiating from the mouth, clear with tentacles along the edge. Tentacles ca. 20, 10-20 cm long, densely branched, giving it a fluffy appearance. Stem with axial lines, not sticky.