Widespread on Atlantic facing coasts of the British Isles, the sponge Suberites carnosus is usually almost spherical and grows to about 15cms both in height and diameter with just one osculum (inlet/outlet) positioned at the top. However, occasionally for reasons unknown it develops laterally and forms huge clumps when there may be several osculum. It is pale brown or light orange and velvety to the touch. The common name sea orange is occasionally used but is not reliable because it is sometimes applied to related and similar sponges.
Loch Hourn, Western Scotland