I saw this beautiful specimen of Umbaculum mediterraneum during a dive in a Mediterranean coral reef at a depth of over 70 meters. In many years of diving I had never come across this nudibranch. It is an adult specimen of rather large dimensions, in fact it is well over 20 cm in length. This leads me to think that, together with Aplysia depilans, it is among the largest nudibranchs present in the Mediterranean Sea.

In this dive we met one of the many nudibranchs (sea snails) that populate our sea, Peltodoris atromaculata - Dotted sea slug very similar to the Jorunna funebris (Dotted nudibranch), also called Sea cow or Leopard snail. Peltodoris atromaculata Dotted sea slug Vacchetta di mare intotheblue.it ...

Peltodoris atromaculata, more commonly known as the dotted sea slug or sea cow, is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Discodorididae. It dwells in salt water up to the depth of 40m. It is exclusively found in precorralligene and coralligene communities and is very common in such communities.

We found these three specimens of Felimare tricolor on a rocky and coralligenous bottom at a depth ranging from 45 to 50 meters. These animals are quite common in the Mediterranean and are also difficult to photograph and film ...