Meet the Atlantic Bluet (either an immature male or a female, alas, the end of its abdomen is not quite in focus enough for my inexperienced eyeballs to tell), a narrow-winged damselfly found in the Caribbean and North America. Males are a beautiful bright blue, which may be related to the name “bluet”.
This genus, with ~35 North American species, is plagued by Wikipedia Stub Syndrome. Not just the species, the genus. Admittedly, those 35 species are very difficult to tell apart in the field, so it’s probably not every aspiring graduate student’s cup of tea for field research, but still.
Identified via the kind folks at iNaturalist.