Every angler wants to know what they’ve got on the end of their line. For some, it’s because they’re looking for something to bring home for the table and knowing what species you have not only helps keep your significant other happy by serving blackfin tuna rather than bonito, but it also keeps you out of trouble with the law.
Regarding the true billfishes—the scientific family Istiophoridae—luckily, we’re only dealing with nine species: blue marlin, black marlin, striped marlin, white marlin, sailfish, longbill spearfish, shortbill spearfish, Mediterranean spearfish, and roundscale spearfish. Not too bad, right? Especially when you compare this family of fishes to something such as the snapper family (Lutjanidae), which has 113 species.
Nevertheless, although the billfish family is quite small compared to other bony fishes, from time…