Trivia monacha (da Costa, 1778)
British Isles to Morocco, Azores to western Mediterranean.
 
Predator on sessile preys, mostly Ascidians like Diplosoma listerianum (Milne-Edwards, 1841), in the infralittoral down to circa 100m deep. Three dark spots on the dorsum, the central one often divided in two parts. Original taxon: Cypraea monacha. –3m deep, Isola Rossa, NW. Corsica. 10-13mm.
Synonyms: acuminata, occinella, europaea…
Rochelongue, Cap d’Agde, Hérault, S. France. 9mm.
Specimens from English Channel.
Collected in crevices on rocks at extreme low tide, zone of red algae (Sphaerococcus coronopifolius Stackhouse), Petit Bey islet, Saint-Malo, N. Brittany, NW. France. 10-10,5mm.
The animal in Forbes & Hanley: A history of British Mollusca and their shells vol. I, London 1853, plate NN.
Ballyhenry Island, Strangford Lough, North Ireland.
Original picture provided by C. Morrow for iNaturalist.
– (CC BY-NC) –
Anse-aux-Moines (Monks’s Cove – Sinus Monacharum), Saint-Jean d’Orbestier, Vendée, W. France. Original picture provided by J. Renoult for iNaturalist – (CC BY-NC).

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