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Distribution in scandinavian waters
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Maximum diametre: 4,1 cm, but is seldom more than 1,5 cm in
Swedish waters.
Appearance: The exoskeleton is white to light grey. There appears
to be a gape between the two top plates because the seams are thick
and the joints irregular. Rock barnacles are usually relatively flat
in form, but do on occasion grow in height, this species to has a somewhat
curved form.
Depth: From close to mean
sea-level to about 60 m; on rare occasions noticably deeper.
Environment: This species is often found on shells,
but can also be found on for example cliffs,
rocks or wood. It does not build apparent bands
like the northern rock
barnacle and the brackish water bay
barnacle.
Classification: The gaping rock barnacle belongs to the cirripedia
group, which is a crustacean under the arthropods.
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