Cypraecassis rufa
Cypraecassis rufa is a species of large sea snail, a marine gastropod mollusc in the family Cassidae. It is commonly known as the bullmouth shell or red helmet shell, and also as the cameo shell. Description
This large species attains a size of 200 mm. Distribution
This species is found off the southern African coast from northern KwaZulu-Natal and Mozambique. It is more common in Mozambique. It is also a common shell to find on the shores of Kenya. References

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Cassidae
Gastropods described in 1758
Taxa named by Carl Linnaeus