sargassum fish
... that the sargassum fish is a predator that can change its colour rapidly to blend in with its surroundings?
... that the <b id="mwCHQ"><a class="mw-redirect" href="./Sargassumfish" id="mwCHU" rel="mw:WikiLink" title="Sargassumfish">sargassum fish</a></b> <i id="mwCHY">(pictured)</i> is a <a href="./Predation" id="mwCHc" rel="mw:WikiLink" title="Predation">predator</a> that can change its colour rapidly to blend in with its surroundings?