Tonna galea
... that the snail Tonna galea is one of very few species of prosobranch gastropods that are luminescent?
... that the snail <i id="mwAsE"><b id="mwAsI"><a href="./Tonna_galea" id="mwAsM" rel="mw:WikiLink" title="Tonna galea">Tonna galea</a></b></i> <i id="mwAsQ">(shell pictured)</i> is one of very few species of <a href="./Prosobranchia" id="mwAsU" rel="mw:WikiLink" title="Prosobranchia">prosobranch</a> gastropods that are <a href="./Luminescence" id="mwAsY" rel="mw:WikiLink" title="Luminescence">luminescent</a>?