This little slug feeds on algae, but instead of digesting the algae's chloroplasts, it stores them in its back and uses them to generate energy from sunlight. 

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We mostly see them feeding on algae on shallow rocks where they get lots of sun light. 

Pink flabellinas eat venomous hydroids, steal their stinging cells (nematocysts), and transports them safely through their guts to the tips of their cerata where they use them as their own personal defense system.​​

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You'll find these pink divas mostly on deeper dive sites where they sit on hydropolyps.

Much like the Elysia timida, Elysia Hopei also practices kleptoplasty—stealing chloroplasts from algae to harness solar energy directly through its tissues.

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That's why we also find this species mostly on shallow, algae-covered rocks with plenty of sunlight.

This innocent-looking thief absorbs the yellow pigments from the sponges it eats for camouflage, then weaponizes their toxins to make itself taste entirely unappealing to predators.​

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These nudis mostly show up when the water gets colder and we can find them anywhere from shallower to deeper depths.

Just like the flabellina, the caloria elegans preys on stinging hydroids and stores their stinging cells in the cerata on its back as a painful defense against predators.​

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This nudibranch almost always sits on orange sponges so keep an eye out for them on rock walls covered in sponges.

Growing up to an impressive 15 cm, the Giant Doris is one of the largest nudibranchs in the Mediterranean. When threatened, it instantly curls its body into a tough, defensive ball while releasing the toxins it "steals" from the sponges it eats.​​

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We mostly see these huge slugs on sponges and on boat dive sites when the water is colder.​​

This slug warns predators with its bright colors to stay away. It feeds on sponges and stores their toxic compounds in specialized mantle glands which make it taste terrible. 

This nudibranch is another one whose hobby it is to eat hydroids and steal their stinging cells for its own defense against predators.

This nudibranch is another one who's hobby is eating hydroids and stealing their stinging cells for its own defense against predators. ​

This solar-powered alien species originates from the Indo-Pacific and was first spotted and recorded in the Mediterranean Sea by one of our in-house marine biologists Alexandra Slater in 2025.  ​

This microscopic hunter detects and hunts down tiny, stalked colonial animals called entoprocts that grow hidden among sponges on the reef.​

Melibe engeli is a small, transparent sea slug  known for its ghost-like appearance and unique hunting style. It uses a large, expandable oral hood like a throw-net to catch tiny swimming crustaceans, as well as hosting photosynthetic algae inside its body—earning it the nickname "solar-powered".

Like many of it's relatives, the pilgrim hervia practices cleptoplasty, meaning it stores the stinging cells of its food inside its own body to use as a shield against predators.​

This nudibranch not only repurposes its food's stinging cells as a defense against predators, it also pratices "cellular recycling", meaning it distributes nutrients from its special diet into its otherwise translucent body tissues to get its brilliant coloration.

Philinopsis speciosa uses a rapid vacuum-pharynx to swallow prey whole and a chemical slime-tracking radar to hunt other sea slugs. Its first recorded presence in the Hellenic Seas was documented by our staff instructor Sabrina Winkel in 2025.