Costa Rica fishing is also considered as one of the best adventures and fishing destinations in Central America, as the country’s waters are rich in fish, including the ever-popular Black and Blue Marlin and Sailfish. Costa Rica’s population figure was an astonishing 4,987,142 by 2018, but if there is one thing you need to know about this nature-loving community, it is that they are very friendly, hospitable and very relaxed.