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ALEXANDRE MEINESZ

Tortoiseshell sea slug

In Dive.Explo360: Mediterranean · Northeast Atlantic · Atlantic Ocean

Encountering a Tortoiseshell sea slug is often a pleasant surprise on a dive. This large sea slug in orange or purplish-brown shades readily blends into the surroundings. Its bumpy surface and inconspicuous lifestyle make it a fascinating species to observe on the seabed.

Habitat de Tortoiseshell sea slug Habitat
Sand, Detrital bottom, Seagrass meadow
Profondeur de Tortoiseshell sea slug Depth
5-100 m
Groupe biologique de Tortoiseshell sea slug Group
Mollusc
Rôle écologique de Tortoiseshell sea slug Role
Predator

WHAT DOES IT LOOK LIKE?

This large marine mollusc is distinguished by its thick, flexible body, covered in irregular raised areas forming small bumps. It can reach a substantial size, making it easy to spot. Its colour varies from orange to purplish brown, sometimes with darker shades. Its appearance suggests a rough surface. It secretes mucus containing substances that deter predators.

WHERE DOES IT LIVE?

It occurs on different seabed types, particularly sandy or rocky ones and seagrass beds. It generally lives between a few metres and several dozen metres deep, often resting on the bottom.

WHAT DOES IT EAT?

It mainly feeds on attached organisms such as some sponges and sea squirts, which it takes directly from the substrate.

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Other species — Mollusc

Umbrella slug Three-coloured Aglaja European Squid Mediterranean Helmet Shell Painted Sea Slug Mediterranean triton Giant Doris Rough pen shell

Same habitat and depth

Sandy seabed species Detrital seabed species Seagrass meadow species

Same ecological role and depth

Predatory species

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