Clathrina ceylonensis is a species of calcareous sponge from Sri Lanka.

Cormus massive, formed of thin, irregular and tightly anastomosed tubes, with a reticulated surface.

Klautau and Valentine elevated this variety to the status of a species because C. ceylonensis is very distinct from C. coriacea.

Despite morphological similarities, such as the presence of water-collecting tubes and the size of the triactines, they can easily be distinguished.

The distribution of C. coriacea seems to be restricted to northern Europe, while C. ceylonensis occurs only in the Indian Ocean.