The Red sponge or spirastrella (Spirastrella cunctatrix) is a sponge of the Spirastrellidae family belonging to the demospongiae class. It is an encrusting red-orange sponge (which can sometimes turn green, blue and grey), characterized by very evident channels that culminate in the osculum, rough to the touch due to the presence of spicules. It can also cover large expanses of seabed. It can be confused with the encrusting forms of Crambe crambe. It is common in the Mediterranean Sea up to 30 meters, sometimes present even at greater depths, in dimly lit, rocky environments, often in caves. Often associated with coralligenous and Astroides calycularis.

Tedania anhelans is a sea sponge that has an arborescent shape with colors that vary from transparent to light gray or dark gray depending on the conditions and depths of the environment in which it lives and personally I also add based on age: more pale in the juvenile phase or darker in the mature phase. It is present throughout the Mediterranean Sea at a depth ranging from 10 to over 100 meters on hard substrates, in rocky walls but also, as in our case, on Gorgonians and fishing nets abandoned for several years. In fact, the Tedania sponge reproduces very easily.

The Axinella polypoides, is a species of sea sponge belonging to the Demospongiae class, family Axinellidae and at phylum Porifera. it's present throughout the Mediterranean Sea. It comes in the form of a sapling and lives at a depth ranging from 20 meters to over 300 meters.

Sponges, contrary to what one might think at first sight, are very simple multicellular animal organisms very similar in shape and appearance to plant organisms. ...

Common Antlers Sponge, Axinella polypoides, is a species of sea sponge belonging to the Demospongiae class, family Axinellidae and at phylum Porifera. it's present throughout the Mediterranean Sea. ...

The sponge Callyspongia ramosa belongs  to the Porifera phylum, Demospongiae class, Haplosclerida order, Callyspongiidae family. Sponges, the members of the phylum Porifera are a basal Metazoa (animal) clade as a sister of the Diploblats. ...

Azure Vase sponge, is a species of sea sponge belonging to the Demospongiae class, family Callyspogiidae. This movie movie was made during a diving in the Carribean sea, in the coral reef of Cayo Largo, a small island in the Los Canarreos Archipelago ...