Due to poor weather conditions, Ironman Cozumel has just decided not to proceed with the swim. Participants will only bike and run.
Along the shore, however, spectators are also reporting that there are too many stingrays in the water, so the safety of athletes cannot be guaranteed. Plausibly, it seems to be a combination of both factors, but at least there will be no swimming.
The start has been postponed indefinitely, but athletes could start in a very short moment from now.