Monetaria annulus (Linnaeus, 1758)
Abundant throughout the Solitary Islands Marine Park. Ranges throughout the Indo Pacific region. In Australia recorded from south western Western Australia, across the tropical north, through Queensland and south to southern NSW.
Found in tidal rock pools and occasionally shallow reef. Usually concealed under rocks and in crevices. Often found in same habitat as M. moneta.
The ivory or yellowish coloured shell with its bright orange ring on the dorsal surface gives this cowrie its common name, "Yellow ringed cowrie". The mantle is grey/black with a fine delicate pattern. Papillae are short and yellow/grey in colour. Egg masses are yellowish-white, see lower photograph. Grows to 30mm.