APHOTOMARINE

An educational resource dedicated mainly to the photography
and diversity of marine life that can be found in coastal waters
and intertidal areas of Great Britain and Ireland by David Fenwick.

A-P-H-O-T-O Wildlife Stock Image Library
Idaliadoris depressa (Alder & Hancock, 1842) - An onchidoridid nudibranch (Seaa slug images)
Scroll down and rollover titles to change screen image or click on title to view image.
Onchidoridid nudibranch
Idaliadoris depressa
- dorsal view 1

Onchidoridid nudibranch
Idaliadoris depressa
- on Schizomavella linearis 1

On its food Schizomavella linearis, found on a plastic creel collar from a lobster pot that was washed-up at low water after a storm, at Sennen Cove, Cornwall, 18.01.18.

Onchidoridid nudibranch
Idaliadoris depressa
- dorsal view 2

Onchidoridid nudibranch
Idaliadoris depressa
- dorsal view 3

Onchidoridid nudibranch
Idaliadoris depressa
- foot / ventral view 1

Onchidoridid nudibranch
Idaliadoris depressa
- with 0.1mm division rule 1

Onchidoridid nudibranch
Idaliadoris depressa
- food Schizomavella linearis 1

Onchidoridid nudibranch
Idaliadoris depressa
- food Schizomavella linearis 2

Juvenile 2mm specimen of Idaliadoris depressa was found under an overhang on a low spring tide at Albert Pier Reef, Penzance, Cornwall. 19.10.16. This small species or dorid feeds on the bryozoan Schizomavella linearis, pictured above. This species is under-recorded because of its size and because it camouflages so well on its food.

Species kindly verified by Egidio Trainito.

The species is also known as Knoutsodonta depressa, Onchidoris depressa and Doris depressa..

Page updated 13.08.23.

Idaliadoris depressa Knoutsodonta Onchidoris Doris nudibranch nudibranchia Sea Slug images
The main objective of this website is in furthering environmental awareness and education through the medium of photography. To increase awareness and access to the wildlife of the region and help
people find and identify it. Sometimes the difference between species is obvious but many species can only be determined by observing microscopic characteristics that are specific to any one species.