Description
A large rounded sponge up to 15 cm in diameter and height up to 10 cm. The consistency is firm-hard, but slightly compressible. The smooth surface is bluish or violet-grey and extensively perforated with inhalant orifices. Larger exhalant openings (osculum) are distinct and usually in lines or arranged in clusters. The skin (cortex) is distinct and 1 mm thick, underneath the surface the colour is yellow-white.
In the latest article
Source information
©1998-2011, The Marine Biological Association of the United Kingdom
© The Marine Biological Association of the United Kingdom
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Supplier:
Marine Life Information Network
Editor: Dr Harvey Tyler-Walters
Author: Anna Neish
Anna Neish 2007. Pachymatisma johnstonia. A sponge. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 26/01/2011]. Available from:
