Episode 1
Reported Missing
24m
Clownfish are disappearing from the bay, so the girls spring into action to find out why. A mysterious diver could be the culprit.
Where to watch H2O: Mermaid Adventures
TV series
H2O: Mermaid Adventures
2015TV-Y72 seasons7.0 / 10
The lives of teenagers Emma, Cleo and Rikki are forever changed when a magical, forbidden island gives them the power to turn into mermaids.
Availability
Not streaming in United States
H2O: Mermaid Adventures premiered June 1, 2015. We don't have a confirmed streaming, rental or purchase option yet.
Synopsis
The lives of teenagers Emma, Cleo and Rikki are forever changed when a magical, forbidden island gives them the power to turn into mermaids.
Season 2 episodes
Choose an episode, then use the watch options above for the show.
Episode 2
Memory Lapsse
24m
When the stone circle causes Cleo to forget that she can turn into a mermaid, Emma and Rikki scramble to keep her from transforming in public.
Where to watch H2O: Mermaid Adventures
Episode 3
Valentine's Day
24m
Lewis promises to tell his Valentine's Day sweetheart, Abby, a big secret; Cleo is jealous and scared that he will give away the girls' mermaid identities.
Where to watch H2O: Mermaid AdventuresEpisode 4
Kidnapped!
24m
The girls and Bobby the dolphin untangle a mystery when Bobby's twin, Robby, is captured by someone in a mysterious speedboat.
Where to watch H2O: Mermaid AdventuresEpisode 5
A Strange Phenomenon
24m
When her father goes to sea on a mission, Cleo's worries begin to affect her dreams. Her nightmares could be trying to tell her something.
Where to watch H2O: Mermaid AdventuresEpisode 6
Handle with Care
24m
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.
Where to watch H2O: Mermaid AdventuresEpisode 7
The Return of the White Mermaid
24m
To protect the White Mermaid, the girls guide explorer Stanley Finch to the underwater stone circle, whose magic makes Stanley think he's a pirate.
Where to watch H2O: Mermaid AdventuresEpisode 8
Three Days Underwater
24m
When a spell forces Rikki to remain a mermaid until the next full moon, she has to find a way to lie low, and underwater, for three full days.
Where to watch H2O: Mermaid Adventures
Episode 9
Robot Duel
24m
Lewis is thrilled when the university hosts an underwater robot competition, but the girls fret over the safety of their marine friends.
Where to watch H2O: Mermaid AdventuresEpisode 10
The Creature from the Bay
24m
Emma's younger brother catches a glimpse of her mermaid tail and thinks he's seen a sea monster, and soon the whole town is in an uproar.
Where to watch H2O: Mermaid AdventuresEpisode 11
Underwater Takeover
24m
The mermaids turn to a cranky giant octopus for help when the Vandals invade the bay with a horde of stinging jellyfish.
Where to watch H2O: Mermaid AdventuresEpisode 12
Imminent Danger
24m
Having played one too many practical jokes, Teddy can't get anyone to believe his warning that an underwater volcano is about to erupt
Where to watch H2O: Mermaid Adventures
Episode 13
Trapped
24mfinale
Lewis joins a famous explorer in a high-tech submarine to hunt for a sunken treasure ship, but a mishap strands them at the bottom of the sea.
Where to watch H2O: Mermaid AdventuresEpisode information updated Sep 3, 2026
Available now in United States
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More about H2O: Mermaid Adventures
Cast
Katharina von KellerEmma (voice)
Patrick BachLewis (voice)Sonja SteinCleo (voice)
Robert MisslerBernie (voice)
Céline FontangesRikki (voice)
Production details
- Status
- Canceled
- Series type
- Scripted
- Episodes
- 26
- Original language
- German
- Original title
- H2O - Abenteuer Meerjungfrau
Networks & production
KiKaGermany- Les Cartooneurs AssociésFrance
- Fantasia AnimationChina
ZDF EnterprisesGermany
Themes
meerjungfraumermaid