Phylum Porifera.
There are many different species of sponge in the Mediterranean. Caves are a particularly good place to find them.

- Black sponge (Ircinia spinosa)
- Orange agelas (Agelas oroides)
- Orange-red encrusting sponge (Crambe crambe)
- Brush sponge (Ciocalypta penicillus)
- Kidney sponge (Chondrosia reniformis)
- Kidney sponge (Chondrosia reniformis) reproduction
- Hyper calcified sponge (Petrobiona massiliana)
- Stinker sponge (Ircinia variabilis)?
- Mycale (carmia) macilenta?