Polymastia gleneni is a sponge with a cushion-shaped base covered with short rounded
nipples and reaching 10 to 50 cm in diameter. Its colour varies from pink to purplish pink, nipples being paler.
Pink tit-sponges are attached to rocks, they are often covered with sand and only the outgrowths emerge from it.
It is recorded in the North-Western part of the English Channel and in the Atlantic. Its known distribution goes from the Iles Glénan (South-Brittany, West of France) to Roscoff (English Channel). A close species (perhaps a similar one) is recorded in the Mediterranean Sea: Aaptos papillata.
Aaptos papillata is a species similar to Polymastia gleneni. If these two sponges prove to be just one single species, the name of the species "papillata", which was first given, would have priority.
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Top photograph :
© Wilfried Bay-Nouailhat. Published with author's kind permission :
Polymastia gleneni, Iles Glénan, South-Brittany, West of France. Depth 16 meters.
Text : Wilfried Bay-Nouailhat © 2004-2017.
Translation : Anne Bay-Nouailhat © 2007-2017.