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Giant Doris

Distribution : Mediterranean · Atlantic Ocean

Nineteenth-century illustrations of the giant doris did not escape scientific criticism. Writing in 1879, Rudolph Bergh considered the available depictions generally inadequate, although he preferred the illustration in Le Monde de la mer, published in 1865 under Alfred Frédol's pseudonym. His assessment documents the difficulty of conveying the appearance of a vividly patterned marine animal through printed artwork.

Habitat of Giant Doris Habitat
Wreck, Seagrass meadow, Rocky habitat
Depth range of Giant Doris Depth
5-50 m
Biological group of Giant Doris Group
Ecological role of Giant Doris Role
Predator

Average size

15 cm

WHAT DOES IT LOOK LIKE?

The giant doris (Felimare picta) has yellow dots, small patches and sometimes broken lines across its body. The background colour varies widely. It can be blue-violet or pale, depending on the individual.

The smooth, elongated, fairly deep body is edged by a wavy fold. Two rhinophores, the upright head projections, mark the front, while the gills gather in a feathery tuft at the rear.

WHERE DOES IT LIVE?

It mainly lives on rocky seabeds, drop-offs and areas rich in attached organisms. It is sometimes found near seagrass beds, but remains mainly associated with hard substrates where the sponges grow. It generally lives between a few metres and around fifty metres deep.

WHAT DOES IT EAT?

The giant sea slug feeds on certain sponges attached to rocky seabeds. It moves slowly over their surface and removes small portions of tissue with its radula, a ribbon bearing tiny teeth inside its mouth. As it moves, it may pass from one sponge to another. Its food therefore comes from animals attached to rocks rather than prey it pursues through the water.

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Giant Doris

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