It may be best not to get too worked-up about this, but instead be alert for these guys. Before going for a swim check and see if anyone on the beach is actively trying to feed the fish and maybe even ask Cedrick if he has heard or seen anyone get nipped in recent days. That's what I'm going to do when we visit in March. The chances of stepping on a long-spined urchin or a jellyfish tentacle are probably just as likely, so exercising caution would be smart move. I've been in these waters countless times with or without a suit on and have never had anything nip or bite me on Orient Beach.