Dercitus bucklandi is usually found filling crevices in vertical overhanging rock faces. It has the appearance of a black membrane stretched across the back of the crevice.
The colour is black to dark grey-brown externally and a greyish-yellow internally. This sponge lives especially on limestone.
Note: Especially the gray and black sponges are look very similar, there is often confusion.
Biota >Animalia (Kingdom) > Porifera (Phylum) > Demospongiae (Class) >Astrophorida (Order) > Ancorinidae (Family) >Dercitus (Genus)