Several ducts converge into each oscula; these exhalant openings are raised slightly above the surface and have transparent margins, but they are relatively inconspicuous.
The surface of this sponge may be slightly rough, the texture is soft and compressible but porous, and the tissue crumbles easily.
Hymeniacidon kitchingi could be confused with Halichondria bowerbanki, but that species has longer, more slender lobes and a different range of spicules.
[3] Hymeniacidon kitchingi is native to the northeastern Atlantic Ocean, where its range extends from Scotland southwards to Finistère in northern France, and includes the western parts of the English Channel.
After fertilisation, the embryos are brooded inside the sponge, and when they reach the last embryonic stage, they pass out through the oscula into the water column.