Favorite thing: There are various locations, usually marinas, where you can get a Florida fishing license. You will need this not only for fishing, but if you plan to collect any coral species or invertebrates. Don't be caught without it. They are sold for different periods of time ranging from a week to longer timeframes.
When people say 'dolphin', they immediately think Flipper. But there are two different kinds of animals that are called dophins. One of them (the Flipper type ones) are mammals. The other one is a fish, and is quite different.
The fish pictured in the mural is the fish dolphin. When people talk about catching and/or eating dolphin, lots of less informed people shy away. So - depending on their clientel, the restaurants sometimes call the fish-dolphin "mahi mahi" on their menus. Mahi mahi is the local Hawaiian name for dolphin.
Common names for animals and plants can be very confusing. It would be more precise if we called them all by their scientific names (genus and species), but THAT will never happen - at least not in my lifetime.
Fondest memory: I'm not a fisherman, but I like to EAT fish - one of my fondest memories is going to a restaurant here and eating seafood. Anything from the lobster roll at Keys Fisheries (yum yum) to Snapper Matzalan at Castaway.
Fishing is way big business in Florida, especially in the Keys where golf playing isn't so much and option and the beaches aren't so good as they are up north. Almost any restauraunt will be glad to cook your catch for you for a charge of under $10.00. I know the 7 mile Grill will even do it two or three different ways if you have enough fish for that.