Neptoona is a legendary fish that is known to be uncatchable, as many fishermen had tried to catch the slick critter but failed. It gets its name from Poseidon formal name, Neptune and from his favorite fish he likes to eat, tuna. Neptoona is related to the swordfish. Its species is legendary because they have rarely been seen by humans. It is said that if one were to catch one these beautiful fishes, they will be granted endless luck and a long, ever lasting romantic life. It is also said that Neptoona is one of the keys needed to find the powerful Legend Sword.