Space Dandy 2nd Season

While fishing in a calm lake, Meow mentions a rare alien fish called a Munagi that appears once every 3,600 years and is worth 50 million wulongs at the Registration Center. The Aloha Oe heads to the planet Kaiyu to track the fish, but gets stuck in "space kelp," forcing Dandy to teleport to the surface himself. On the planet, he makes friends with a little girl and goes fishing with her, but can't seem to win any favor from an old man named Ldelise she looks up to. The girl tells Dandy the legend that the Munagi is only around when a "blue moon" can be seen from the planet. As Dandy begins to doubt the Munagi's existence, Meow and QT spot a large blue comet that only comes near the planet every 3,600 years. When the comet gets close to the planet, the Munagi appear on the surface of the ocean while Dandy, Ldelise, QT, Meow, and everyone from the fishing village band together to catch it. As the Munagi escape to the blue comet, Dandy appears to have survived the ordeal, sans fish. The Aloha Oe later returns to the same lake from the beginning of the episode as Meow mentions another rare alien fish. (Source: Wikipedia)