snrub, I also ate fried fish in Rio Lagartos way back in '88. It was then called Pescado entero grande (whole big fish), and yes, for a fact, it was deep fried whole in manteca, which made it taste So Good! Every time we ordered it we got a fish hanging over both ends of a long oval plate. We sought out this dish throughout the Yucatan, Belize, and Guatemala. Invariably the fish served was mullet, locally referred to as Liseta.
We took a panga tour down the Rio, mainly for bird watching. Nearly every bird our guide pointed out was described as muy sabroso! He laughingly insisted the roseate spoonbills were included in that sabroso bunch. Spoonbills probably taste worse than mergansers that have been gorging on carp.