Bermuda fireworm
... that shortly after the full moon and precisely 55 minutes after sunset, the female Bermuda fireworm rises to the sea surface and produces a bioluminescent display?
... that shortly after the full moon and precisely 55 minutes after sunset, the female <b id="mwBio"><a href="./Odontosyllis_enopla" id="mwBis" rel="mw:WikiLink" title="Odontosyllis enopla">Bermuda fireworm</a></b> rises to the sea surface and produces a <a href="./Bioluminescence" id="mwBiw" rel="mw:WikiLink" title="Bioluminescence">bioluminescent</a> display?