Mako: Island of Secrets ran for three seasons and 68 episodes, from July 26, 2013, to August 28, 2016, on Network 10 and Eleven. It is a children’s show about mermaids, and it is better than that description makes it sound.
Trailer, via Jonathan M. Shiff Productions.
Zac Blakely Falls Into the Moon Pool
The premise is clean and it is set up fast. A pod of true-born mermaids has re-colonized the waters around Mako Island after a long absence. Three young members — Lyla, Nixie and Sirena — are assigned to guard the island during the full moon. They neglect the job. Zac Blakely, a local teenage boy, goes camping on Mako Island with his friend Cameron, gets lured to the Moon Pool, and falls in with the full moon overhead.
By morning Zac can control water. After he accidentally falls in again, he has a fish-like tail. He is a merman, and his existence is a problem for every merperson in the ocean.
The pod casts out the three girls who let it happen. Their only route back is to grow legs, live on land, and take Zac’s powers away. That is the engine of season one, and it holds.
A Spin-Off That Knows Its Predecessor
Mako: Island of Secrets is a spin-off of H2O: Just Add Water, set five years after it. It is produced by Jonathan M. Shiff Productions with Network Ten, ZDF and Netflix, with assistance from Screen Australia and Screen Queensland. Shiff created it. It was released internationally as Mako Mermaids.
The show does not lean on nostalgia. It uses the older series as a foundation and then builds its own rules. The Moon Pool, the full moon, the tail that appears when water touches you — all of it is inherited. What is new is the merman.
Zac is the first male lead the franchise has had, and the show treats that as a genuine problem rather than a novelty. His powers threaten to expose merpeople to the world. The mermaids are not villains for wanting them gone. They are trying to protect a secret, and he is the leak.
Ondina, Mimmi and Weilan Arrive
The cast turns over, and the show survives it. In season two, Lyla and Nixie leave to search for a new home. Sirena stays, joined by Ondina and Mimmi. The mermaids keep working to strip Zac’s powers and reclaim the island for the pod.
Then the show makes its best move. Evie, Zac’s girlfriend, is transformed into a mermaid while trying to save him from an ambush. The others help her cope with the change. A character who spent a season on the outside is suddenly inside the thing she was shut out of.
Season two also brings Erik, another merman, and the reveal that Zac is a born merman and Mimmi’s brother. That is a lot of plot, and the show carries it.
- Zac Blakely, played by Chai Hansen
- Evie McLaren, played by Gemma Forsyth
- Ondina, played by Isabel Durant
- Mimmi, played by Allie Bertram
- Weilan, played by Linda Ngo
The Rules of Mako Island
The mechanics matter more than the mythology. This is a show about a small set of physical laws and the trouble they cause.
Water triggers the tail. The full moon does something stranger. The Moon Pool is a place with a memory. Zac’s connection to Mako is not a power he earned; it is a connection he formed by falling in at the wrong moment.
That is a smart piece of design. It means the mermaids cannot simply beat him. They have to reason with the rules, and the rules are not on anyone’s side. Season two adds the merman chamber, another piece of Mako’s machinery, and the show keeps its focus on discovery rather than combat.
Three Seasons, 68 Episodes, One Clean Ending
Season three sends Sirena to Hawaii with her sister Aquata. Zac, Ondina and Mimmi are joined by Weilan, an Eastern mermaid who has fled to Mako for sanctuary from a magical water threat. The show ends on August 28, 2016.
The genres listed for Mako: Island of Secrets are comedy, sci-fi and fantasy, drama, and action and adventure. That is accurate. The show moves between them without much friction. The comedy is broad and aimed at its audience. The fantasy does the heavy lifting. The drama is mostly about being sixteen and keeping a secret that would ruin your life if anyone found out.
Here is how the show’s best material ranks, from strongest to weakest:
- Evie’s transformation and the season she spends inside the secret.
- The reveal that Zac is Mimmi’s brother, which pays off two seasons of setup.
- Weilan’s arrival and the sanctuary plot that closes the show.
- The original season one standoff over Zac’s powers.
That last part is the actual subject. The mermaid tail is a metaphor the show never has to explain, because its audience already understands it.
Where the Show Slips
The effects have not aged well, and they were not lavish when they were new. The tail looks like a tail. The water manipulation looks like water manipulation. For a show built on transformation, the transformation is the least convincing thing on screen.
The pacing also sags in the middle of each season. The mermaids’ plan to remove Zac’s powers resets more than it should. Characters learn the same lesson twice.
And the show is long. Sixty-eight episodes is a lot of time to spend on a premise that resolves the same way each time. The strongest material is in the arrivals — Evie’s transformation, Weilan’s flight to Mako, the reveal about Zac and Mimmi. The connective tissue in between is thinner.
None of that is fatal. It is a children’s show made on a children’s budget, and it knows what it is.
What Mako: Island of Secrets Gets Right
The show understands that the interesting question is not whether Zac keeps his powers. It is what the people around him are willing to do about it.
The mermaids are cast out for a mistake that was mostly bad luck. They have to live on land, among humans, with legs they were not born with, to fix something they did not entirely cause. That is a real predicament, and the show gives it real weight.
The Evie arc is the best version of this. She gets transformed while trying to rescue Zac, and the show does not treat it as a reward. It is a disruption. She has to learn a body and a secret at the same time, and the other mermaids have to decide whether she is theirs or not.
That is the show at its sharpest. It is about who gets to belong to a pod, and what it costs to be let back in.
The published audience score for Mako: Island of Secrets is 7.6 out of 10, from 633 votes on TMDB. That number is fair. The show is not a classic of the genre, and it does not try to be. It is a well-built machine for telling one story about a boy who fell into the wrong pool and the girls who have to clean it up.
What it gets right, it gets right cleanly. The premise is strong. The rules are consistent. The cast turnover does not break it. The reveal that Zac is Mimmi’s brother lands because the show earned it across two seasons.
What it gets wrong is mostly a matter of resources and length. The effects cannot sell the transformation. The middle stretches repeat themselves. Sixty-eight episodes is more than this idea needed.
The part worth watching is the second season, when the show stops being about Zac and starts being about everyone who has to live with what happened to him. That is where Mako: Island of Secrets finds its footing, and where it becomes more than a spin-off with a tail.
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