This is such an unfortunate incident.
I have been following this story on Lonely Planet's forum, and one of the posters says he/she was there at the time, and that those waters were extremely dangerous and red flagged, and Mr Quan, acted like a hero to go save another swimmer's life, sadly losing his own in doing so.
Clearly the family and friends feel that there will be no closure without recovering his body.
I do understand and sympathize completely, but I fear that the sea does not give back what she takes, and these poor folks are going to suffer for a long time, wondering.
May he rest in peace.