Giant Marlin

While it is mostly similar to a common marlin, it is also of a titanic stature shown to be several times larger than a rowing-boat. It had a blue grey colouration upon its body and fins along with bright red eyes. Its most peculiar feature, however, was its snout, which had the shape and abilities of a double-edged sword. For a number of years, the marlin also had a fūma shuriken embedded into its head.

After the war, it stayed at the Land of Fire's harbour, attacking any boats in open water. Yūsuke and his father tried to catch it, but the attempt failed and resulted in Yūsuke's father's death.