about 1 cm across. Conical shell made up of plates. Commonly seen
on boulders on many of our shores usually crowded in lower portions
and shaded crevices. Also on living crabs and living snails.
across. Flatter shell forms star-like rays where it attaches to the
rock. Operculum conical and protrudes from the opening. Usually found
higher up on rocks and walls in small crowded clusters.
about 3cm across. Tall conical shells not made up of plates, with
a ridged texture, small shell opening operculum recessed. On large
2cm. Usually attached to hard surfaces that float in the open sea,
and rarely found on the shore. Shells thin made up of several plates,
on a leathery stalk. Sometimes seen on large objects that have been
floating in the open sea.
is invisible, but eventually produces tiny egg sacs that emerge through
the joints of the infected crab. Infected crabs sometimes seen on
our Northern shores.
slits (0.2cm) sometimes blue on the surface of hard corals. Sometimes
seen on our Southern shores.
feet (0.5cm long) with white spots, sticking o ut of holes in the Chocolate sponge. Sometimes
seen on some of our shores.