Showing posts with label periwinkles. Show all posts
Showing posts with label periwinkles. Show all posts
Wednesday, March 18, 2015
Juvenile flat periwinkles
These are juvenile flat periwinkles (Littorina obtusata) developing in a blob of jelly on the surface of a seaweed. Each animal, developing inside its translucent, delicate, helical shell, is about half a millimetre in diameter at this stage. When it hatches from the jelly this marine snail will eventually reach a diameter of about one and half centimetres.
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