Note: If you are looking for the episode where the characters graduate high school (often confused as a season finale), that is Season 2, Episode 26 ("The Chosen One"). If you are looking for the very last episode of the show, see below.
Since the show has ended, the canon continuation is the original series "H2O: Just Add Water" (which takes place chronologically later, but was filmed earlier).
Here’s a complete blog post exploring Mako Mermaids Season 4, Episode 16 — the final episode of the series. mako mermaids season 4eps16 top
Title: Mako Mermaids Season 4, Episode 16: A Tidal Wave of Endings and New Beginnings
Blog Post
For fans who stuck with Mako Mermaids through its magical run, Season 4, Episode 16 isn’t just another episode — it’s the grand finale. Titled simply as the season closer (sometimes listed as “Episode 16” without a separate name in some guides), this chapter wraps up the underwater drama, the land-walking chaos, and the emotional arcs of our favorite pod of mermaids.
So, did it deliver a worthy ending? Let’s dive in. Note: If you are looking for the episode
Let’s be honest — Season 4 was shorter than previous ones, and Episode 16 shows the strain. A few subplots are resolved in single lines of dialogue (remember the merman council? Neither does the episode). The water dragon buildup was intense, but its defeat comes a little too easily. Also, some secondary human characters (like Evie and Chris) are barely in the finale, which feels like a missed beat given their investment in earlier seasons.
Air Date (hypothetical): N/A (fan concept)
Runtime: 24 minutes
Written by: (Fan speculation)
Directed by: (Fan speculation) Here’s a complete blog post exploring Mako Mermaids