Common Piddock (Pholus dactylus)
|Bonnet Shell||Common Limpet|
|Black Footed Limpet||China Limpet|
|Slipper Limpet||Common Tusk Shell|
|Cowrie Shell||European Cowrie|
The Common Piddock bores into soft rock or wood, and can reach a length of about 6 inches. The shell is white and very brittle with concentric lines and radiating ridges. This species is known for being bioluminescent, glowing a bluish-green in the dark. Also known as angel-wings, from the appearance of both shells when still joined together.