It sounds like you caught a Greater Amberjack. Another member of this family that you may be familiar with is the pompano, which is very good to eat. Some people eat Amberjack, but they are foolish to do so. They are a Parasite that live only in the fish, but they do not usually kill it. I would not eat these fish because they can poison you.
Amberjacks have concentrations of poisonous microscopic plankton in their flesh.
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