Mako: Island of Secrets is an Australian television programme for children and teenagers created by Jonathan M. Shiff.

[1][2] The series follows Zac, a teenage boy who turns into a merman after accidentally falling into a magical pool of water on the fictional island of Mako.

With Lyla and Nixie away searching for a new home, Sirena is left with Ondina and Mimmi, new mermaids who continue the effort to remove Zac's powers and reclaim the island for their pod.

In series 3, with Sirena away in 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 dragon.

[17][18] On 8 November 2013, broadcasts of the show were switched from Network Ten to the free-to-air digital channel Eleven, first airing on Friday mornings at 8:00 a.m. and later changed to Sunday mornings at 11:00 a.m. A second series was confirmed in February 2013, with production beginning in the second half of 2013 contingent on funding from Screen Australia.

[19] The first half of series two premiered on Netflix on 13 February 2015 in North and Latin America, United Kingdom, and other territories.

[23] The series introduced Chinese mermaid Weilan (Linda Ngo),[24] and featured the special guest appearance of Cariba Heine as Rikki Chadwick in the final two episodes.