|Kingdom Animale | Phylum Mollusca | Class Bivalvia|
These shells are permanently attached to rocks on their deeply conical right valves. The rather flat left valve fits like a cover on the right one, thus giving the shell its common name. (Diameter up to 8 cm).
From A Guide to Seashore Life by Dr Leo W H Tan and Peter K L Ng
Published by the Singapore Science Centre and sponsored by BP
@Raffles Museum of Biodiversity Research and Singapore Science Centre