APHOTOMARINE

An Educational Photographic Resource and Stock Image Library
of the Sea, Maritime Environment, Marine and Rockpool Life in the
Coastal Waters of South-West England by David Fenwick.

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A Pelagic Sea Slug
Fiona pinnata
- top view close-up 1

A Pelagic Sea Slug
Fiona pinnata
- side view close-up 1

A Pelagic Sea Slug
Fiona pinnata
- underside close-up 1

A Pelagic Sea Slug
Fiona pinnata
- corrugated flaps on cerata 1

A Pelagic Sea Slug
Fiona pinnata
- close-up / with scale 1

A Pelagic Sea Slug
Fiona pinnata
- stalked egg mass 1

Images of species taken at Sennen Cove, Penwith, Cornwall. 15.12.11. SW 35630 26665.

The species, with its eggs, was found amongst a colony of Lepas anatifera (Stalked or Goose barnacles) on a short piece of sleeper type timber. The timber also contained the shipworms Bankia gouldi, Teredora malleolus and Nototeredo norvagica; and also two, one male and one female Planes minutus, known as Columbus crabs. The timber had obviously drifted across the Atlantic from the Western Atlantic or Caribbean Sea.

Fiona pinnata feeds on both Lepas species, which gives the slug its brown colour here in the images; but also on Velella velella, By the wind sailor, which turns the animal a bluish colour.

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