I remember vividly seeing HUGE Dark Blue Parrot Fish on the Pacific side of Panama in the 50's into the 70's but come to think of it - I have not seen a single one on my return diving trips the past few years. Not sure what this means since to the best of my knowledge Parrot Fish are NOT harvested in Panama like in so many other locations. We had, and still have the smaller Parritfish of various hues in Panama but the Big Blue ones really stood out for their color and size. And yes - they would poop white sand.
I ate some in Baja and It is a very white, mild, tender fish. one of the most expensive in the fish markets I'm told.
Interesting storyline.