When Mr Flip takes the Reefies on an excursion to explore an underwater shipwreck, Ray goes missing and the excursion quickly turns into a search for a missing stingray.
The Reefies are excited to get their fins dirty in a sand-digging competition, but Surg the surgeonfish is nervous about trying new activities and needs some convincing before she'll join in.
The Reefies team up in pairs to compete in the ocean-famous piggyback race. When a surprise competitor joins the race, the results turn unexpectedly fishy!
When Doug the dugong takes the Reefies on an excursion to the ocean's pristine 'cleaning station', Ray the stingray is faced with an unexpected conundrum: Is being clean more fun than being messy?
Mr Flip's not having any luck settling down the clownfish for nap time. Will Oli the octopus' magical story about an underwater fairy finally get them to fall asleep?
When Jaws the jawfish loses his special shell, the Reefies put on their detective caps to solve the mystery. Could a peculiar peacock shrimp hold the missing clue?
After a swimming lesson from Mr Quick, Chips the pufferfish is determined to swim across the reef to visit Mr Flip. Will Chips manage to journey such a long way when he's only just learning to swim?
The Reefies are puzzled when a plastic bag floats into Reef School. Mr Flip explains where it came from and why it's dangerous for anyone living in the reef.
Ray is worried about how his little sister will go on her first day in the Reefling nursery. Mr Flip reassures Ray that there are many different ways to make new friends, especially if you're a good singer.
It's a wild and windy day on the reef! Ray helps Ms Flouncy escape from the swishy-swirly water, while Mr Flip tells a wonderful tale about a sea slug who loves all types of weather.
Surg the surgeonfish is reluctant to play imaginative games at Reef School but with some help from Mr Flip and the Reefies, she leads a game that turns into an intergalactic adventure.
When Oli the octopus discovers the coral is turning white, Chips the pufferfish's Nan tells the Reefies a special story about the beautiful colours of the reef back in the olden days.
Oli the octopus is curious about her body growing bigger, so Mr Flip tells the Reefies a story about a seal who learns what it means to 'grow up' when she goes on a brave adventure to meet a sea dragon!
It's a day of super hero fun as theReefies chat about what their dream superpower would be. After an adventure and a singalong, Ray the stingray finally decides on an ultimate superpower.
After Doug the dugong cleans up Reef School, Ginger the clownfish can't find her special, treasured sea grass. The Reefies come to the rescue, embarking on a search to locate her tidied-up treasure.
It's Mr Flip's birthday! Ms Flouncy and the Reefies are planning the ultimate surprise party for him, but Oil gets her tentacles in a twist wanting everything to go perfectly.
When popular music group, The Sea Lions, cancel their visit to Reef School, the Reefies decide to put on their own concert, but Jaws the jawfish finds it hard to share the spotlight.
Surg the surgeonfish is excited for her first ever sleepover! While she loves the noisy chaos of the clownfish twins' household, the sleepover makes her value the simple quiet of her own home.
The Reefies join Faye, the Chief of Police, on a special Police Patrol. Snout the seahorse is worried he's not fast enough, so when help is needed, will he be able to 'save the day'?
It's Reef Camp and the little Reefies are excited to sleep overnight at Reef School. But Ray the stingray's curiosity to find the legendary 'spooky fish', leads him on a fun adventure in the dark!
It's Pet Day and the Reefies have the job of looking after Ms Flouncy's pet, Stoney. When Stoney goes missing, Jaws the jawfish quickly learns about the challenges and joys of pet ownership.
A lesson from the reef's gardening guru, Parrot, teaches Ray the stingray the importance of patience. And the Reefies discover who dug the mysterious holes in Mr Flip's coral garden.
When the Reefies discover a mysterious feather, they head off on an adventure to find the owner and Chips the pufferfish learns there's no such thing as a silly question.
The Reefies are on a mission to discover which sea creature is the biggest in the ocean. To answer a question this big, the Reefies need to work together as a team.
Ray the stingray's little sister wants to be a great explorer, just like him. But when she gets lost on an adventure, Ray and the Reefies track her down using clever clues from a song.
Mr Bwap the eel teaches the Reefies about grown-up's jobs. When Jaws the jawfish can't decide which type of work he'd like to do, the Shelley dolphins reveal their plan to become circus acrobats.
Surg is in a flap! She can't decide what she'll bring to Reef School for show and tell. When she eventually decides what to show the Reefies, they're dazzled by the colourful surprise.
When Mayor Moira, visits Reef School for Mother's Day, she regales the Reefies with surprising stories about their mums. Oli the octopus can't believe the incredible facts she learns about her gold medal winning mum!
The Shelley dolphins take the Reefies on a tour of the reef to learn about friendships. Chips the pufferfish is reminded of his long-lost pal from the Reefling Nursery, so he sets out on a mission to find him.
It's the reef's annual swimming carnival and the Reefies are ready to cheer along their fast fishie friend, Dash. Together, they learn it's not important whether you win or lose; it's just about giving it a go.
When Oli the octopus wins a game of hide and seek, she's awarded a special prize; the chance to learn expert hiding skills from the reef's Master of Disguise.
When Police Chief Faye takes Mr Flip and the Reefies on an exciting excursion to an underwater volcano, Chips must navigate his way through a bubbly dilemma.
When a sandstorm blows over the reef, Reef School is left in a messy muddle! Ray the stingray and Doug the dugong meet a lost penguin and help to find an answer to her tricky problem.
Chips the pufferfish isn't a confident counter, but after a special lesson from the reef's numbers genius, Mr Bwap, he gets all the confidence he needs to play hide and seek.
It's the last day of Reef School! Ahead of their holiday adventures, the Reefies hear about Sally the zebra shark's awesome travels and the familiar face she unexpectedly encountered along the way.