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To
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.
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To
about 1 cm across. Commonly seen on flower crabs on many of our shores. |
0.5-1cm
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. |
To
about 3cm across. Tall conical shells not made up of plates, with
a ridged texture, small shell opening operculum recessed. On large
boulders. |
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Stalked barnacles
Lepas sp.
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Parasitic barnacles
Thompsonia sp.
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| About
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. |
Barnacle
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. |
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