
About
It doesn't sting or burn. A protected species - collecting it is prohibited.
What looks like a single cushion is actually a colony of hundreds of tiny polyps sharing a common calcium-carbonate skeleton. Each small "cup" on the surface is the mouth of an individual polyp; at night the animals extend their tentacles to capture plankton.
The common name "pillow coral" comes from the colony's characteristic brownish-yellow, rounded shape on the seabed. This is Cladocora caespitosa, the only stony coral in the Mediterranean that forms true reefs. At Mesimvria it's often found attached to rocks within sandy seabeds, at a depth of 1-3 metres.
It's a strictly protected species: its skeleton is fragile and its growth rate extremely slow (around 5mm per year), so a colony of typically photographed size can be 20-30 years old. Touching, stepping on, or detaching it is prohibited. It's completely harmless to humans.




















































