Red Papillae Dorid (Diaphorodoris papillata)

Diaphorodoris papillata Nudibranchs in Gozo

Diaphorodoris papillata is a captivating species of sea slug, a dorid nudibranch belonging to the family Onchidorididae, superfamily Anadoridoidea, order Nudibranchia, suborder Doridina, and phylum Mollusca. Endemic to the Mediterranean Sea, this species is also found in the Canary Islands and along the west coast of Portugal. These tiny yet vibrant creatures add a splash of color to the underwater landscapes around Gozo.

How To Identify a Diaphorodoris papillata Nudibranch?

Identifying Diaphorodoris papillata is relatively straightforward due to its distinctive features:

Size: It grows to a maximum length of 10 mm.
Coloration: The body is white, adorned with bright red, pointed dorsal papillae.
Mantle Border: The mantle has a yellow border, enhancing its striking appearance.
Rhinophores: The white, lamellated rhinophores are large and have an opaque terminal part. These specialized sensory organs are retractile and prominent on the head.

Diaphorodoris papillata Characteristics

Diaphorodoris papillata exhibits several notable characteristics:

Dorsal Papillae: Bright red and pointed, they provide a stark contrast against the white body.
Sensory Organs: The lamellated rhinophores are essential for sensing the environment and are a key feature in identifying the species.
Diet: This nudibranch feeds on encrusting bryozoans, which are small, colonial animals found on underwater surfaces.

Diaphorodoris papillata Habitat and Behavior

Diaphorodoris papillata prefers specific habitats:

Location: It is endemic to the Mediterranean Sea but can also be found in the Canary Islands and along the west coast of Portugal.
Environment: This nudibranch thrives in areas where encrusting bryozoans are abundant, often found on rocky substrates.
Behavior: Diaphorodoris papillata is known for its solitary behavior, often spotted alone rather than in groups.

Interesting Fact About Diaphorodoris papillata

An interesting fact about Diaphorodoris papillata is its unique defensive mechanism. The bright red papillae serve as a warning coloration to potential predators, signaling that the nudibranch may be toxic or distasteful. This aposematic coloration is a common trait in many nudibranchs, providing them with a measure of protection in the wild.

Macro Diving With Diaphorodoris papillata in Gozo

Macro diving in Gozo offers a fantastic opportunity to observe Diaphorodoris papillata up close. The island’s diverse underwater terrain provides ideal conditions for macro photography and detailed study of these small yet fascinating creatures. Key diving spots include:

Reqqa Point: Known for its rich marine biodiversity, Reqqa Point on Gozo’s north coast is an excellent location to find Diaphorodoris papillata. The rocky substrates here are home to many encrusting bryozoans, the primary food source for these nudibranchs.
Billingshurst Cave: This cave offers a unique diving experience where divers can spot various nudibranch species, including Diaphorodoris papillata, in their natural habitat.

Diving in these areas not only allows for the observation of Diaphorodoris papillata but also provides a glimpse into the intricate and colorful world of marine life that thrives in Gozo’s waters.