The “Robin Redbreast Triton” is a common but lovely ranellid with a very wide distribution throughout the Indo-West Pacific region. A carnivorous gastropod like other Septa species, it lives beneath or among corals of the reefs in shallow to moderate depths of around -5~30m.

When alive, the brilliant intense red colour is hidden under a layer of bristly periostracum, rather thick and chestnut yellow in colour. There is usually a diffused white band around the fifth spiral cord. Typical shell length around 40mm, very large specimens may exceed 55mm.

It is similar to a number of other Septa species such as S. bibbeyi (Beu, 1987) and S. hepatica (Röding, 1798), and is sometimes confused with them. In Japan it is renowned as one of the “Three Beautious Snails”, along with S. flaveola (Röding, 1798) and S. hepatica. – From Chong Chen’s post

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