Opistobranchs - and especially the group of the Nudibranchs - include some of the most colourful, amazing creatures on Earth. They are hard to spot, bou can find them in the Mediterranean Sea.
The opisthobranchs are invertebrate animals (Mollusca-Gastropoda) commonly known as sea slugs. They are characterized by a small or absent shell. Among the best known opisthobranchs are the nudibranchs, invertebrate animals with spectacular color. They generally are small - some millimeters long - but larger species can reach 40 cm. Having no mechanical protection, their only defense relies on their camouflage, and on their toxicity, secreted by them or accumulated from their food. For divers, it is possible to find these species all year round in the Mediterranean Sea, from shallow waters to depths of well over 700 m.
Europe's marine wildlife is pretty amazing. Poke in to learn some more!