I was out there last wednesday also and was shocked of the great amount of mantas feeding on the surface . I never though that was possible to see that many in the Caribbean , really an amazing spectacle . Our boat didn't have bridge so we don't have that perspective but they were everywhere. Also millions of sardines and lots of dolphins.
I regret not having spent more time with the mantas, since was our first day out and we spent the whole day looking for the sailfishes without luck ( we only saw one pass by ). Thursday we have some moving baitballs and spend some time with the sailfish but water was not really clear ; after that a north front came and only today is the sea conditions starting to get better .