Nick Upton / Common prawns (Palaemon serratus) scavenging on a damaged Flat top shell (Gibbula umbilicalis) in a rockpool, Cornwall, England, UK, September.
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Nick Upton / Cushion star (Asterina gibbosa) moving in a rockpool near a Flat top shell (Gibbula umbilicalis) and a Common prawn (Palaemon serratus), Cornwall, England, UK, September.
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Nick Upton / Cushion star (Asterina gibbosa) moving in a rockpool near some Flat top shells (Gibbula umbilicalis), Cornwall, England, UK, September.
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Alex Hyde / Detail of Purple Topshell (Gibbula umbilicus) found washed up on a beach. Claigan, Isle of Skye, Inner Hebrides, Scotland, UK. April.
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Sue Daly / Pennant's Topshell (Gibbula pennanti) and Purple Topshell (Gibbula umbilicalis) sea shells on beach, showing difference between species, sea shells on beach, Sark, British Channel Islands.
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Sue Daly / Purple Topshell (Gibbula umbilicalis) sea shells on beach, Sark, British Channel Islands.
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Sue Daly / Purple Topshell (Gibbula umbilicalis) sea shells on beach, Sark, British Channel Islands.