La Perlita when they can get it. Lion fish ceviche with Mango, coconut crusted lionfish, and garlic grilled lionfish. It's all fan-damn-tastic. You might call first and make sure they have some, or go early. If they don't, the garlic grilled lobster will have you going back for more. There was a restaurant just North of Mega that had lionfish as well...it was good, but not memorable. Maybe across from Barracuda or Rock n Java? In that area anyway.
LP is a come as you are place, East of downtown quiet a ways. We take a cab.
Don't miss La Perlita whether they have LF or not.
Safe travels,
Jay