.jpg?v=1fbiioo "Scuba diving, Cassis")
The bay of Cassis has an unknown treasure for those who do not dive under the turquoise waters of the Mediterranean.
Nudibranchs and flat worms, commonly known as sea slugs, are present in abundance below the surface.
They adorn themselves with amazing colors and shapes. Without doubt a way to prevent predators from the toxicity of some of them.
Most have a rough tongue in their oral cavity. They move by contraction of their muscular feet.
ea slugsThe observation of these s is possible in the creeks and in the bay of Cassis.
You can also discover here the fishes that can be observed there.
Diving, for beginners or experienced divers, can be done using existing diving centers such as Narval Plongée or Cassis Calanques plongée.
Sea slug measuring 3 to 5 cm long. Pink to purple color.
Appendages on the back named Cerata with orange or red tips and white tips. Its ringed rinophores have white tips (sensory antennas of Sea slugs).
Very easy to observe in the Calanques National Park.
Sea slug measuring 3 to 5 cm long. Blue, orange-pink and purple color with longitudinal lines.
Appendices on the backs named Cerata with orange or yellow tips. Its rinophores are orange (sensory antennas of Sea slugs , its mouth tentacles blue with white tips.
Very easy to observe in the bay of Cassis.
Sea slug measuring 3 to 5 cm long. Blue, orange-pink, red and purple colorway.
Appendages on the back named Cerata. Its rinophores are orange (sensory antennae of the Sea slugs , its oral tentacles white and it has 2 well defined eye spots.
Very easy to observe in the creeks of Cassis.
Sea slug measuring 3 to 5 cm long. Blue, pink and purple color. Appendages on the back named Cerata.
Its rinophores (sensory antennas of sea slugs) are ringed.
Very common and easy to observe in the Calanques marine park.
Sea slug measuring 3 to 4 cm long. Pink to purple color.
Appendages on the back named Cerata with white tips. Its rinophores are white-tipped (sensory antennae of the sea slugs), as well as its oral tentacles.
Sometimes confused with flabellina affinis. Not so common in Cassis Bay.
Family facelinidae: Sea slug measuring 2 to 4 cm long. Body and white mouth tentacles.
Appendages on the back named dark brown Cerata. Its ringed rinophores (sensory antennae of the sea slugs) are almost translucent white.
A fairly rare species in the Calanques National Park.
Family facelinidae: Sea slug measuring 5 to 7 cm long. Pinkish or yellowish white with bluish lines.
Orange-yellow cerata with red tips.
Long oral tentacles.
Moderately common species in the bay of Cassis.
Family Chromodorididae:
Sea slug measuring 1 to 2 cm long. Bright blue body. A white center line and a white margin coat
Its rinophores (sensory antennas of sea slugs) are dark blue.
A very common species in the bay of Cassis.
Family Chromodorididae: Giant dory sea slug measuring 10 to 20 cm long. Blue body. Colors predominantly yellow and clear or blue violet or even light green. The imposing gill plume is pinnate and composed of eleven gill leaves.
The rhinophores are a degraded indigo blue.
A very common species in Cassis Bay.
Family Chromodorididae:
Sea slug measuring 1 to 3 cm long. Pink to pale blue with three yellow to white lines that can be broken into a series of dots.
His coat has a yellow outline, sometimes lined with white.
A species not so common in Cassis.
Family Chromodorididae:
Sea slug measuring 1 to 3 cm long. Blue body. Three white to yellow lines often broken in multiple points.
Its rinophores (sensory antennas of sea slugs) are blue.
A very common species in the bay of Cassis.
Family Chromodorididae:
Sea slug measuring 1 to 3 cm long. Blue body. Thin yellow and white lines
Its rinophores (sensory antennas of sea slugs) are gray to blue with white lines.
Margin of the yellow coat with fine blue border.
Not so common in Calanques National Park.
Family Goniodorididae:
Size: from 1 to 3 cm. Translucent milky white body with fine white lines.
Translucent ceratas with orange yellow tips. Rhinopores and tentacles with orange yellow tips.
Species endemic to the Mediterranean.
Trapania lineata is an uncommon species in the Calanques National Park.
Family Proctonotidae:
Size: up to 8 cm. Yellow, orange or white. Translucent ceratas with bluish tips.
Two white lines on the front and back.
We can see on the head a kind of remarkable crest.
Janolus cristatus or anti-shovel is a fairly common species in the Calanques National Park.
Opisthobranch family:
Mollusc measuring 1 to 3 cm long, endemic to the Mediterranean.
Bluish to purple color, even black. Two cephalic rhinophores coiled on themselves.
The parapods (lateral extensions united at the back) form an elongated sheath from which the head emerges.
Common species in the bay of Cassis.
Family Pseudocerotidae:
Planar papillae (flat worm) measuring 2 to 5 cm long.
Color varying from light beige to dark brown gray. The body is crossed by a clear midline
Uncommon in the calanques park.
Planar rose (flat worm) measuring 1 to 2 cm long.
Pink color with thin white lines. Two anterior cephalic tentacles of magenta color.
Displacement by crawling, manages to move in open water by undulation.
Common species in the bay of Cassis.
Planar (flat worm) black to dark blue in color, velvety appearance 3 to 5 cm long.
Orange yellow wavy border. Two clearly visible cephalic tentacles.
Displacement by crawling, manages to move in open water by ripple (see on the photo).
Common species in the Calanques park.
