Sycon ciliatum is a species of calcareous sponge belonging to the family Sycettidae.

[2] The surface of the sponge appears furry from its covering of fine papillae.

This species can be distinguished from the rather similar Sycon raphanus by the fact that the choanocyte chambers are not fused but are free from each other.

[3] Sycon ciliatum is common along the coasts of Europe and occurs on the eastern fringes of the Atlantic Ocean from Scandinavia south to Portugal.

[3] It is found low down on the shore and in the neritic zone, amongst seaweed, under stones or in rock pools in areas without strong wave action.