Another great shore dive from Aguadilla, close to Crashboat but slightly more difficult to find, is El Natural. Ask a local or dive shop if you plan to venture here yourself.
This is a gorgeous dive, shallow but with a lot of sponge and reef structures. You can find lionfish, sand eels, flounders, small groupers, and more. A fun, casual dive where you can simply relax on the beach afterward and soak up some sun.
Go on a weekday, as this site will get crowded on weekends just like Crashboat.