Siratus motacilla

Siratus motacilla is a species of sea snail, a marine gastropod mollusc in the family Muricidae, the murex snails or rock snails.

Description
The length of the shell regularly attains 50–60 mm. Its shell colour varies between shades of yellow through pink to a darker red, in strong spiral bands.

This deepwater species can have a considerably extended siphonal canal sometimes accounting for more than half the shell's overall length. The mollusc's operculum efficiently seals the aperture completely.

Distribution
This uncommon species has been trapped alive off the West coast of Barbados Lesser Antilles, at depths around 100 m; also off Martinique.