Liguus
...that the brightly coloured shells of the Liguus snails are so prized by collectors that some varieties are now extinct?
...that the brightly coloured <a href="./Gastropod_shell" id="mwDMk" rel="mw:WikiLink" title="Gastropod shell">shells</a> of the <b id="mwDMo"><a href="./Liguus" id="mwDMs" rel="mw:WikiLink" title="Liguus">Liguus</a></b> <a href="./Snail" id="mwDMw" rel="mw:WikiLink" title="Snail">snails</a> <i id="mwDM0">(pictured)</i> are so prized by collectors that some varieties are now <a href="./Extinction" id="mwDM4" rel="mw:WikiLink" title="Extinction">extinct</a>?