Know your fauna: shells

Common purple snail (Janthina janthina) Rare blue / purple In 1758 Linnaeus gave the scientific name Janthina janthina to a tiny and very delicate purple / blue snail shell and its snail inhabitant. The popular names for this species, which occurs in warm waters worldwide, range from ‘Purperen’ or ‘Paarse zeezeiler’ in Dutch to Common purple snail in English. The animal is not rare, but the color of the shell it produces certainly is. There are very few naturally blue […] Read more »