Red-mouthed rock shell - Stramonita haemastoma
Playa Pinet.
Also found in the Mediterranean Sea:
https://laguiadelacuario.es/invertebrados-marinos/thais-haemastoma/
"Stramonita haemastoma", common name the red-mouthed rock shell or the Florida dog winkle, is a species of predatory sea snail, a marine gastropod mollusc in the family Muricidae, the rock snails.
Similar species: Neogastropoda
By Patomarazul
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Uploaded Jan 28, 2022. Captured Apr 8, 2012 18:12 in 49P7+M5 La Marina, Spain.