violet nudibranch
Flabellina affinis
Characteristics
Scientific name
Size
Depth range
Nutrition
Behave
Frequency in Cyprus
Protection status
Native/Immigrant
Flabellina affinis
2 to 5 cm, maximum about 5 cm
1 to 50 meters, often 5 to 30 meters
Predatory; especially hydrozoans (hydroid polyps)
Slowly crawling, usually found alone on their food
Regularly, but often overlooked due to their small size
No special protection status; not classified as endangered
Native Mediterranean species
A colorful nudibranch that stands out due to its violet coloring and delicate appendages. It often lives on specific types of coral or algae, which it feeds on. Its bright colors serve as a warning signal to predators. Due to its beauty, it is a popular subject for underwater photographers.
Where to Find in Cyprus: Dive Sites & Habitat
The violet nudibranch is widespread throughout the Mediterranean Sea and is also found around Cyprus. It primarily inhabits rocky bottoms, reefs, seagrass meadows, and other habitats where hydroid polyps are present. This species is most commonly observed at depths between 5 and 30 meters, but can also be found at shallower or significantly deeper depths. Due to its small size, it is often only discovered by observant divers or underwater photographers. Sightings are possible year-round, with calm conditions and macro diving increasing the chances of spotting it. It is one of the native nudibranch species of the eastern Mediterranean.
Behavior & Key Features Underwater
Like many nudibranchs, the violet nudibranch feeds primarily on hydrozoans. It can ingest the stinging cells of its prey and store them in its cerata, thus gaining some protection from predators. Its vibrant violet to purple coloration serves as a warning signal. These nudibranchs move slowly over their food and are usually found singly. Divers are particularly drawn to its delicate body structure with numerous thread-like appendages. Due to its small size, this species is ideally suited for macro photography.
Frequently asked Questions (FAQ)
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Is the violet nudibranch poisonous?
It is considered harmless to humans. However, it can store stinging cells from its prey, which deter predators.
How big does the violet thread snail get?
Most specimens reach a body length of 2 to 5 centimeters.
Where can you find the Violet Thread Snail in Cyprus?
Especially on rocky reefs and in areas with hydroid colonies, often during macro dives.
Written by
Sophia