In 1959, Sammy, a Green sea turtle, hatches on a deserted beach and while trying to climb up a sand slope is caught by a seagull. He manages to escape along with another hatchling sea turtle named Shelly who was caught by another seagull. Sammy falls onto an old raft and gets carried into the open ocean, losing Shelly. Later he befriends a leatherback hatchling named Ray. The two friends grow up together. One day Ray shows Sammy his new found Octopus friend Slim, but they are forced to take shelter from an oil spill, caused by an oil tanker shipwreck. After the raft collapses, Sammy and Ray are caught in trawler nets and separated. Hours later, Sammy is thrown back into the sea, but is revived by a dolphin.
Ella's admirer, Babbles, becomes jealous of Ricky, who gets to spend more time with her, so he sets a trap for his rival and gets caught in a jam.
When Albert and his pilot fish, Alpha, won't stop fighting, Ricky and Ella find Alpha a new job with a barracuda, but the pair drives everyone crazy.
Thirsty for adventure, Ricky dreams of leaving the reef and fighting fearsome predators, so Sammy must find a way to show him he is still too young.
When a boat sinks near the reef with a seagull trapped inside, the turtles decide to save him. But poor Pipo doesn't know he's being tricked.
In the village, everyone is a vegetarian. But when Big Boss steals all the food, Albert struggles to hold on before giving in to his old appetites.
Hungry seagulls hunt for Ella and Ricky and will stop at nothing to make a meal of them. Stuck on a high branch, Ricky suffers from vertigo.
When Ricky's grandmother tries to spruce herself up and accidentally glues her eyes shut, Ricky guides her on a risky journey to find help.
When Ricky pretends that he has a terrible illness to get out of school, Ella, Pipo and Annabel do everything they can to try and find a cure.
When a dance contest is arranged for the reef fair, Pipo gets weary of the turtles ignoring his choreography instructions and joins the Rockfish team.
When fishermen capture Lulu's cousin, Ricky and the gang find him being held prisoner in a lobster farm and try to set all the captives free.
Unfairly punished by Lulu because of the rockfish, Ricky takes revenge by damaging the palaver tree and laying the blame on Glitz and her crew.
The seagulls lure Ricky and Ella to the beach to put them on their dinner menu, and the duo's one seagull ally gets hit on the head by a coconut.
Sammy worries when there is no news of Big Boss for a while, and Ricky tries to get information by pretending to switch sides and join the Rockfish.
When Big Boss tries to take control of the reef by pretending that he's clairvoyant, Ella and Annabel reluctantly escort Pipo to his psychic reading.
When the rockfish refuse to share the playground with the turtles, a sports tournament is arranged to settle the dispute. But the rockfish play dirty.
When Lulu tells the class about a legendary treasure exhibited each year during a secret ceremony, Glitz hatches a risky plan to make her way inside.
When Billy the clownfish brags about how important and funny he is, Ricky makes the mistake of letting him know he disagrees.
When the gang meets a small, frightened fish who got out of the big aquarium by mistake, they try to teach him the basics of living in the wild.
The children get excited about an upcoming solar eclipse and decide Leonard's aquarium is the ideal place to see it. But is there room for everyone?
When Pipo's grumbling drives Ricky and Cie to the limit, they try to find a way to change his nature, but learn a hard lesson instead.
Ella and Ricky try to help blobfish Jimbo seduce the octopus of his affection by boosting his confidence and convincing him that he is handsome.
When Ray embarrasses himself after bragging about his youthful strength, he decides to exile himself, but Ricky will not let him go without a fight.
After being unfairly treated, Ella leaves the village dreaming of a perfect reef. But when her dream comes true, her nightmare begins!
Ella seems to be so unlucky that her friends shun her. But when she gets near Annabel, her fortunes change so much that she loses any fear of danger.
Ricky babysits for little Marius and boasts of his heroic adventures. Inspired, Marius ventures beyond the reef and exposes himself to great dangers.
When Sammy punishes the children for misbehaving, Ricky complains that he is uncool. But when a super-cool version of Sammy appears, trouble awaits.
When a baby shark gets caught in the reef, the village quarrels about whether the children should keep him as a playmate or return him to the sea.
When Sammy and Ray get captured by a fishing boat, Ricky, Ella, Rita and Shelly have one night to find their way aboard and save the two grandfathers.
To convince the other seagulls that he is not a traitor, John pretends he will eat Ricky and Ella, but Sammy and Ray think it is happening for real.
When Big Boss decides to invade the reef, he replaces his moray eel sidekicks with his godchildren: baby seahorses he wants to mold in his image!
Leonard the Crab only has one friend: his garden gnome, Norbert. Ricky and Ella decide to show him how great it is to have real friends.
Inspired by a romantic tale he heard in school, Crudd goes on an adventure to conquer Glitz's heart. Worried, his friends go on a quest to find him.
A huge party for Ricky and Ella’s eighth birthday is about to begin, but Ricky has gone missing, and a worried Ella must go find him.