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 Ricky and Ella hunt for a magnifying glass for Pipo's nearsighted father, Ella gets locked inside a human hut, and Ricky must save her.
In order to teach the students to tolerate each other, Lulu organizes a pearl hunt, creating teams of mixed fish, but collaboration seems impossible.
When divers armed with nets and a harpoon capture Pipo and endanger the reef, Ricky, Ella and Annabel must save their friend and scare off the humans.
Irked by Big Boss treating him like an idiot, Philip decides to go back to school, but his brother Marco misses him so much that he cannot do his job.
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.
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.
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?
Pipo is heartbroken when his father wants to move away to a quieter place, so the other turtles try to make their friend's dad change his mind.
The friends create a new game of skill that causes a sensation in the reef, but when Big Boss takes it over and opens a gaming room, all bets are off!
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 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.
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.