In 1959, Luca Paguro, a meek youthful ocean beast, groups goatfish off the shoreline of the Italian town of Portorosso. His folks, expecting that people may chase him, preclude him to move toward the surface. At some point, Luca meets Alberto Scorfano, an individual ocean beast youngster who lives alone over the surface, guaranteeing that his dad basically isn’t around a lot.
Alberto urges Luca to experience out of the sea, showing him that ocean beasts transform into people when dry, however get back to their actual structures when wet. Luca follows Alberto to his refuge on Isola del Mare, where the young men interface while making and riding an improvised, delicate Vespa. After finding their child’s activities, Luca’s folks intend to send Luca to live in the remote ocean with his uncle Ugo. In counter, Luca and Alberto flee to Portorosso to track down a genuine Vespa and travel the world.
The young men cross paths with Ercole Visconti, the neighborhood menace and rehash boss of the Portorosso Cup Triathlon, who attempts to dunk Luca in a wellspring. Giulia Marcovaldo, a little youngster, helps them escape. In order to win the cash required for a Vespa, the young men and Giulia structure a group for the marathon, which includes swimming, pasta-eating, and trekking.
Incapable to swim without uncovering themselves, Luca and Alberto take on the trekking and pasta-eating bits of the race, individually, while Giulia takes the swimming race. After learning this, Ercole promises to beat the gathering and proceed with his series of wins.
While the young men train for the race, and get to know Giulia’s angler father Massimo (who was brought into the world with just one arm), Luca’s folks head to the surface to discover their child. Giulia shows Luca school, and the two bond over an affection for learning, particularly about space science.
Alberto becomes envious of Luca and Giulia’s developing fellowship. At the point when Luca begins disregarding Alberto’s recommendation, and has a go at changing their arrangements to going to class as opposed to venturing to the far corners of the planet, he and Alberto battle. Out of frustration, Alberto purposefully uncovers his actual structure to Giulia. Luca fakes shock at the change, and a grief stricken Alberto is driven off by Ercole.
Giulia later sloshes a cupful of water onto a freezing Luca; seeing his actual personality, she sends him away for his own security.
Luca endeavors to accommodate with Alberto, and finds that Alberto’s dad unexpectedly deserted him some time in the past, making Alberto think he was a terrible child who ought not have companions. Luca embarks to win the Vespa all alone, to make things right. After a few incidents, Luca starts to lead the pack in the bike race, yet is compelled to take cover when it begins to rain.
Alberto shows up with an umbrella, however Ercole thumps it away and both young men are uncovered as ocean beasts. They escape Ercole, who presently expects to spear them to gather abundance cash; Giulia helps by crushing her bicycle into Ercole’s, yet she is harmed. Luca and Alberto turn around to help her, at last facing Ercole. They are protected from Ercole and the other angler by Massimo, who uncovers that the young men are his companions.
He likewise calls attention to they have crossed the end goal and dominated the race. Other masked ocean beasts uncover themselves, including Luca’s family, and the townsfolk cheerfully welcome them. At the point when Ercole will not acknowledge the changes, his own cohorts Ciccio and Guido toss him into the wellspring, tired of his maltreatment.
Luca and Alberto buy a Vespa, however the last offers it to purchase a train ticket for Luca, permitting him to go to class in Genoa with Giulia. Luca’s family, Massimo, and Alberto see Luca and Giulia off at the train station, where they all guarantee to keep in contact. During the credits, Luca meets Giulia’s mom and goes to class, flaunting his ocean beast appearance and later watching people stroll on the moon with Giulia on TV.
Massimo turns into Alberto’s receptive dad, and Alberto and Luca’s family appreciate collaborating with the people in Portorosso. In a post-credits scene, Ugo converses with a wanderer goatfish about how incredible his life is in the profundities of the sea.