Aplysina aerophoba
... that the yellow sponge Aplysina aerophoba turns blue when exposed to air?
... that the yellow sponge <i id="mwBOY"><b id="mwBOc"><a href="./Aplysina_aerophoba" id="mwBOg" rel="mw:WikiLink" title="Aplysina aerophoba">Aplysina aerophoba</a></b></i> turns blue when exposed to air?