H2O: Mermaid Adventures (2015)

Name: H2O: Mermaid Adventures
Genre: Adventure, Animation, Comedy
Rating: 5.3
Cast: Katharina von Keller, Patrick Bach, Sonja Stein, Robert Missler, Céline Fontanges

Adventure · Animation · Comedy

The lives of teenagers Emma, Cleo and Rikki are forever changed when a magical, forbidden island gives them the power to turn into mermaids.

IMDb rating: 5.3 (362 votes)
Seasons: 2
Streaming (US): Netflix
Language: DE
Type: TV series

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Ratings refreshed Aug 19, 2026 · 2 seasons indexed

Cast

Seasons

Season 1 (2015)

7.56 avg 13 episodes 7.5 → 8.3 24 min avg

Season 1 episodes - IMDb ratings
#	Title	Rating	Votes
1	The Secret of Mako Island	7.5	24
2	Caught in the Net	7.3	19
3	The White Mermaid	6.6	17
4	A Stormy Party	7.6	17
5	Mako Island Hotel	7.6	17
6	The Mysterious Seaweed	8.3	17
7	It's in the Bag!	7.4	18
8	Dolphin City Triangle	6.8	17
9	Poseidon's Daughter	8.0	17
10	Dolphin City Mascot	7.9	18
11	Bad Waves	7.8	17
12	Jaw-ache!	7.2	17
13	The Lost Ring	8.3	19

Season 2 (2015)

7.65 avg 13 episodes 7.9 → 7.8 24 min avg

Rollercoaster

Season 2 episodes - IMDb ratings
#	Title	Rating	Votes
1	Reported Missing	7.9	17
2	Memory Lapse	8.7	19
3	Valentine's Day	7.8	16
4	Kidnapped!	8.3	17
5	A Strange Phenomenon	8.1	16
6	Handle with Care	7.0	16
7	The Return of the White Mermaid	7.0	15
8	Three Days Underwater	8.0	16
9	Robot Duel	6.6	15
10	The Creature from the Bay	7.5	16
11	Underwater Takeover	7.0	15
12	Imminent Danger	7.8	15
13	Trapped	7.8	16

H2O: Mermaid Adventures (2015)

Cast

Seasons

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