The video that I present to you shows a Red Alga that has parasitized a Soft Coral (Paramuricea clavata). Parasitism and mutualism, or symbiosis, are very frequent phenomena in the marine world between similar species and different species. ...
It is probably the glass Ctenophore or Bolinopsis vitrea and its host: a transparent Shrimp perhaps from the Phronima sedentaria or in any case a crustacean belonging to the Phronimidae family. ...
Like all summers we witness the "terrible proliferation of jellyfish" that scares us so much. Mediterranea Cassiopeia (Cotylorhiza tuberculata) (Mediterranean jellyfish, Mediterranean jelly or fried egg jellyfish) that we see in this video is a scifomedusa of the Cepheidae family, and is totally harmless. ...
Also this summer we met one of the many "wanderers of the sea" that is one of those species such as tunicate jellyfish and ctenophores that let themselves be carried away by the currents, reducing their movements to a minimum. We are talking about the Glass Ctenophore - Bolinopsis vitrea - which we have already filmed some time ago, this specimen seems quite old but as soon as touched it showed us the splendid reflections of bioluminescence that the ctenophores activate when they are stimulated. ...
Cladocora caespitosa, Cushion coral Madrepora, is the typical madrepora of the Mediterranean and is also considered the most important endemic bioconstructor coral of the Mediterranean Sea. It forms colonies often isolated, but sometimes capable of forming aggregations. Low densities are recorded in the Adriatic (populations are slightly declining), while in other areas the species is in great expansion ...
In this dive of August 15, 2023 we filmed an event that has not yet been documented much in our Mediterranean Sea. This is the reproduction of the red Gorgonian (Paramuricea clavata). Like every year in summer, this beautiful coral reproduces with the synchronized emission of male and female gametes released by the polyps which open by extruding thin semi-transparent filaments exceptionally long up to 5 cm. ...