Les sirènes de Mako Bad for Business (2013– ) Online
Evie discovers that her father Doug has decided to branch out with his tourist diving charter... to Mako Island. Erik asks Zac to hang out since they both know each other's secrets now. Evie tells the gang about her father's new diving destination and the girls are not happy, especially Ondina. When the air compressor on Doug's boat suddenly breaks, Zac suspects Ondina. After learning that she was trapped in the Moon Pool with Sirena and Mimmi, Zac figures out who the culprit really was.
| Episode cast overview: | |||
 | Amy Ruffle | - | Sirena |
 | Isabel Durant | - | Ondina |
 | Allie Bertram | - | Mimmi |
 | Chai Hansen | - | Zac (as Chai Romruen) |
 | Gemma Forsyth | - | Evie |
 | Alex Cubis | - | Erik |
 | Dominic Deutscher | - | Cam (credit only) |
 | Rowan Hills | - | David |
 | Steve Harman | - | Doug |
| Christina Lovell | - | Diver #1 |
| Kristian Dick | - | Diver #2 |
| Gavin Richards | - | Diver #3 |
Mimmi speaks fluent humpback whale.
Erik is now in the loop of knowing that Sirena, Evie, Ondina, and Mimmi are mermaids and that Zac is a merman. They all know that Erik is a merman, as well.