04 Onchidoris muricata

04 Onchidoris muricata

1: contracted specimen with closely-proximate, flat-topped tubercles.
2: more widely spaced club-shaped tubercles with broadly rounded tops on an extended specimen. The internal spicules resemble the segment divisions of a peeled orange.
3: a few small tubercles with narrower tops on the mantle edge.
Menai Strait, Wales. April 2011 & March 2012.