The BEST episodes of H2O: Mermaid Adventures
Every episode of H2O: Mermaid Adventures ever, ranked from best to worst by thousands of votes from fans of the show. The best episodes of H2O: Mermaid Adventures!
“H2O – Mermaid Adventures” is a combination of comedy, friendship and adventures, both on land in Dolphin City and in a marvelous and magical undersea world. The brand-new animated series is taking the original concept of the world-hit live-action series to a whole new level. While exploring the mysterious Island of Mako, three quite ordinary teenage girls fall under a spell that changes their lives. From now on, whenever water splashes any one of them, they are transformed into mermaids! Endless situations and missions draw the three friends into the incredible underwater world where they make new friends: Bernie the hermit crab, Zita the inquisitive eel, Teddy the kid turtle, Sue the mystical manta ray and Carlotta the diva-jellyfish – and have endless fun and wonderful, enchanting adventures under the sea.
![Three Days Underwater](https://cdn.episode.ninja/file/episodeninja/5291848.jpg)
#3 - Three Days Underwater
Season 2 - Episode 8 - Aired 7/15/2015
When a spell forces Rikki to remain a mermaid until the next full moon, she has to find a way to lay low -- and underwater -- for three full days.
![The Secret of Mako Island](https://cdn.episode.ninja/file/episodeninja/5237354.jpg)
![Kidnapped!](https://cdn.episode.ninja/file/episodeninja/5291844.jpg)
#6 - Kidnapped!
Season 2 - Episode 4 - Aired 7/15/2015
Bobby's twin brother gets abducted by someone in a curious speedboat.
![Bad Waves](https://cdn.episode.ninja/file/episodeninja/5237364.jpg)
![Memory Lapse](https://cdn.episode.ninja/file/episodeninja/5291842.jpg)
#9 - Memory Lapse
Season 2 - Episode 2 - Aired 7/15/2015
Cleo forgets about her ability to change into a mermaid, so Emma and Rikki must make sure she doesn't transform in public
![Imminent Danger](https://cdn.episode.ninja/file/episodeninja/5291857.jpg)
#11 - Imminent Danger
Season 2 - Episode 12 - Aired 7/15/2015
Having played one too many practical jokes, Teddy can't get anyone to believe his warning that an underwater volcano is about to erupt.
![Valentine's Day](https://cdn.episode.ninja/file/episodeninja/5291843.jpg)
![The Return of the White Mermaid](https://cdn.episode.ninja/file/episodeninja/5291847.jpg)
![It's in the Bag!](https://cdn.episode.ninja/file/episodeninja/5237360.jpg)
![Handle with Care](https://cdn.episode.ninja/file/episodeninja/5291846.jpg)
#21 - Handle with Care
Season 2 - Episode 6 - Aired 7/15/2015
Tired of the racket Miriam and Zane are making at their beach party, Bernie leaves his cave -- giving the Vandals a chance to move right in.
![The Creature from the Bay](https://cdn.episode.ninja/file/episodeninja/5291851.jpg)
![Robot Duel](https://cdn.episode.ninja/file/episodeninja/5291850.jpg)
#25 - Robot Duel
Season 2 - Episode 9 - Aired 7/15/2015
Lewis is thrilled when the university hosts an underwater robot competition, but the girls fret over the safety of their marine friends.