The series focuses on the adventures of a half-human, half-oyster mutant named "Boyster", who was born from a toxic spill and adopted by a pair of humans and raised with his shell brother Shelby. Naturally, Boyster has to keep his oyster side under wraps, but he will use his many oyster-esque abilities to save the day.
With yogurt, Molusco makes a beautiful pearl necklace for Alicia's birthday, who is delighted. But the young girl turns blue... the yogurt had expired! With Coco's help, she will do everything to cure her friend.
Molusco unintentionally upsets Arthur and feels terrible. To bring a smile back to his fellow science fiction fan, he disguises himself as an alien and walks past his windows until he crashes into Arthur's garden, delighted to have a friend from space...
After watching a documentary about mollusks and seeing his classmates' disgust, Molusco thinks that no one will ever love him the way he is. He decides to dress up as a superhero to make himself loved...
Because of Molusco, the whole class will have a test the next day. Molusco then decides to go and get the answers to the test from the terrible Mr. Pluss. Undercover mission...
Molusco accidentally bumps into Axelle, an older student and Heavy Metal fan. As Axelle prepares to punch him in the face, an electric current runs through them both. Could it be love at first sight?
Molusco accompanies Coco on a visit to the museum. But back home, Molusco discovers that Coco has stolen a painting of a scallop shell: he has fallen in love...
Molusco spends all his time at Bruno's, new in the neighborhood, and Rafik feels left out. Molusco doesn't yet know that Bruno is none other than a chef particularly fond of oysters, who has taken the appearance of a little boy.
Molusco accidentally breaks Coco's precious TV and replaces it with a goldfish. But Molusco soon regrets his actions: this fish is taking his place in Coco's heart...
To look as muscular as Ozzy, Molusco starts working out, in vain. He finally has a genius idea: he places pearls all over his body to look like a real athlete. But the pearls soon start reacting strangely...
Molusco falls at school and is sent to the hospital for x-rays. Unfortunately, he doesn't have a skeleton! He finds one in a doctor's office and swallows it, reassured. Except that it's a monkey skeleton and they take him for the missing link...
Molusco and Rafik sign Coco up for a TV game show that he's particularly good at. To get in, Molusco does the body and Coco the head. But the other contestants aren't very honest...
Molusco thinks he has no sense of humor, at least not the same as his fellow humans. He decides to work on it and starts putting on jokes and shows all the time...
Molusco makes beads for Bruce, Rafik's little brother. But it doesn't take long for the latter to be kidnapped by a gang: Bruce has a big debt of beads, which Molusco offers to repay during a tournament that pits him against a terrible opponent.
Coco refuses to attend a party of scientists. Molusco decides to surprise his brother and organizes the party at their house! But the scientists are more distracted than expected and the party turns into carnage...
The day before the class photos, Molusco finds himself unattractive: he lands on the heads of the puffer fish, who give him a very original hairstyle. Except that the fish are poisonous and poison Molusco, who suddenly suffers from an excess of self-confidence.
Molusco and Rafik realize that their favorite actor, Jason Tatane, is filming in town. They are disillusioned: Jason has become a has-been who makes commercials for yogurts. The two friends decide to do everything they can to make Jason regain his star status.
It's summer, it's hot and Molusco and Rafik decide to dig a swimming pool in their garden to become the kings of the summer. But things get out of hand: they use so much water to make the pool attractive that they empty the city's water reserves...
Molusco and Rafik borrow Alicia's cat Vanille for their "viral" video. Except that the cat who becomes a web star and Alicia's parents keep the phenomenon going, much to Alicia's dismay. Molusco must fix his mistake.
The day before the class photos, Molusco finds himself unattractive: he lands on the heads of the puffer fish, who give him a very original hairstyle. Except that the fish are poisonous and poison Molusco, who suddenly suffers from an excess of self-confidence.
Molusco has become addicted to a show about survival in a hostile environment. He then takes Coco and Rafik on an expedition to the countryside. But he quickly discovers that he is not the adventurer he thought he was...
In front of the glass of an aquarium in which Poulpo is swimming lazily, Molusco convinces himself that he understands the language of octopuses and that it needs his help. With the help of Rafik, he decides to free it.
Molusco uses his powers to save a baby, but telling the truth could put his secret in danger. So Rafik plays the hero and becomes a star. Except that he quickly develops a taste for fame...
Eugene and Lola have made Molusco a hydrotinette: a kind of water scooter for children. But Molusco finds that it doesn't go quickly and he replaces it with Coco. Except that after a few energy drinks, Coco becomes uncontrollable.
Molusco discovers that he has caught oyster fever, an oyster disease. It's the day of the school dance competition, which would allow them to win a new console. They will do everything so that Molusco can participate.
Molusco and Rafik get caught by Mr. Pluss in the hallways because they are laughing at a photo on Molusco's phone: Coco asleep, disguised as a girl. Mr. Plusse is smitten and asks to meet this beautiful woman, whom Molusco passes off as his aunt. The beginning of an idyll?
Lola is out of work and Molusco's parents decide to move. Molusco and Rafik will do everything to prevent this and cause disasters throughout the city.
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