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The Best Episodes of H2O: Mermaid Adventures

Every episode of H2O: Mermaid Adventures ranked from best to worst. Let's dive into the Best Episodes of H2O: Mermaid Adventures!

Binge this in 9h 36m•Peaking at 8.6/10

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

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Episode Rankings

  1. #1 Fan Favorite
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    H2O: Mermaid Adventures Season 2 Episode 2 - Memory Lapsse
    8.6/10(18 votes)

    #1 - Memory Lapsse

    S2:E2

    No description available

    Director:Unknown
    Writer:Unknown

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  2. H2O: Mermaid Adventures Season 1 Episode 6 - The Mysterious Seaweed
    8.3/10(17 votes)

    #2 - The Mysterious Seaweed

    S1:E6

    Aggressive blue seaweed attacks Emma.

    Director:Unknown
    Writer:Unknown

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  3. H2O: Mermaid Adventures Season 1 Episode 13 - The Lost Ring
    8.3/10(19 votes)

    #3 - The Lost Ring

    S1:E13

    Rikki takes matters into her own hands by spying on her dad and his new girlfriend.

    Director:Unknown
    Writer:Unknown

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  4. H2O: Mermaid Adventures Season 2 Episode 4 - Kidnapped!
    8.3/10(17 votes)

    #4 - Kidnapped!

    S2:E4

    No description available

    Director:Unknown
    Writer:Unknown

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  5. H2O: Mermaid Adventures Season 2 Episode 5 - A Strange Phenomenon
    8.1/10(16 votes)

    #5 - A Strange Phenomenon

    S2:E5

    No description available

    Director:Unknown
    Writer:Unknown

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  6. H2O: Mermaid Adventures Season 1 Episode 9 - Poseidon's Daughter
    8.0/10(17 votes)

    #6 - Poseidon's Daughter

    S1:E9

    Dolphin City is the location for a new movie.

    Director:Unknown
    Writer:Unknown

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    The 20 WORST Episodes of H2O: Mermaid Adventures

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  7. H2O: Mermaid Adventures Season 2 Episode 8 - Three Days Underwater
    8.0/10(16 votes)

    #7 - Three Days Underwater

    S2:E8

    No description available

    Director:Unknown
    Writer:Unknown

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  8. H2O: Mermaid Adventures Season 1 Episode 10 - Dolphin City Mascot
    7.9/10(18 votes)

    #8 - Dolphin City Mascot

    S1:E10

    Danny gets captured by the Oceanic Center for observation.

    Director:Unknown
    Writer:Unknown

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  9. H2O: Mermaid Adventures Season 2 Episode 1 - Reported Missing
    7.9/10(17 votes)

    #9 - Reported Missing

    S2:E1

    No description available

    Director:Unknown
    Writer:Unknown

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  10. H2O: Mermaid Adventures Season 1 Episode 11 - Bad Waves
    7.8/10(17 votes)

    #10 - Bad Waves

    S1:E11

    Lewis and the girls must find what's behind mysterious sound waves that are creating havoc.

    Director:Unknown
    Writer:Unknown

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  11. H2O: Mermaid Adventures Season 2 Episode 3 - Valentine's Day
    7.8/10(16 votes)

    #11 - Valentine's Day

    S2:E3

    No description available

    Director:Unknown
    Writer:Unknown

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  12. H2O: Mermaid Adventures Season 2 Episode 12 - Imminent Danger
    7.8/10(15 votes)

    #12 - Imminent Danger

    S2:E12

    No description available

    Director:Unknown
    Writer:Unknown

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  13. H2O: Mermaid Adventures Season 2 Episode 13 - Trapped
    7.8/10(16 votes)

    #13 - Trapped

    S2:E13

    No description available

    Director:Unknown
    Writer:Unknown

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  14. H2O: Mermaid Adventures Season 1 Episode 4 - A Stormy Party
    7.6/10(17 votes)

    #14 - A Stormy Party

    S1:E4

    A storm threatens to wash out a birthday party.

    Director:Unknown
    Writer:Unknown

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  15. H2O: Mermaid Adventures Season 1 Episode 5 - Mako Island Hotel
    7.6/10(17 votes)

    #15 - Mako Island Hotel

    S1:E5

    Zane's father plans a luxury resort on Mako Island.

    Director:Unknown
    Writer:Unknown

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  16. H2O: Mermaid Adventures Season 1 Episode 1 - The Secret of Mako Island
    7.5/10(24 votes)

    #16 - The Secret of Mako Island

    S1:E1

    Cleo, Emma and Rikki get stranded on Mako island and fall into a magic pool where their lives change forever.

    Director:Unknown
    Writer:Unknown

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  17. H2O: Mermaid Adventures Season 2 Episode 10 - The Creature from the Bay
    7.5/10(16 votes)

    #17 - The Creature from the Bay

    S2:E10

    No description available

    Director:Unknown
    Writer:Unknown

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  18. H2O: Mermaid Adventures Season 1 Episode 7 - It's in the Bag!
    7.4/10(18 votes)

    #18 - It's in the Bag!

    S1:E7

    Discarded plastic bags pose a threat to Teddy and his friends.

    Director:Unknown
    Writer:Unknown

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  19. H2O: Mermaid Adventures Season 1 Episode 2 - Caught in the Net
    7.3/10(19 votes)

    #19 - Caught in the Net

    S1:E2

    Emma competes in a contest, Cleo is stuck babysitting an intern and save an injured sea turtle.

    Director:Unknown
    Writer:Unknown

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  20. H2O: Mermaid Adventures Season 1 Episode 12 - Jaw-ache!
    7.2/10(17 votes)

    #20 - Jaw-ache!

    S1:E12

    Berk breaks a tooth and wanders near the beach in pain, causing a panic.

    Director:Unknown
    Writer:Unknown

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  21. H2O: Mermaid Adventures Season 2 Episode 6 - Handle with Care
    7.0/10(16 votes)

    #21 - Handle with Care

    S2:E6

    No description available

    Director:Unknown
    Writer:Unknown

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  22. H2O: Mermaid Adventures Season 2 Episode 7 - The Return of the White Mermaid
    7.0/10(15 votes)

    #22 - The Return of the White Mermaid

    S2:E7

    No description available

    Director:Unknown
    Writer:Unknown

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  23. H2O: Mermaid Adventures Season 2 Episode 11 - Underwater Takeover
    7.0/10(15 votes)

    #23 - Underwater Takeover

    S2:E11

    No description available

    Director:Unknown
    Writer:Unknown

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  24. H2O: Mermaid Adventures Season 1 Episode 8 - Dolphin City Triangle
    6.8/10(17 votes)

    #24 - Dolphin City Triangle

    S1:E8

    Atmospheric disturbances result in disastrous consequences.

    Director:Unknown
    Writer:Unknown

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  25. H2O: Mermaid Adventures Season 1 Episode 3 - The White Mermaid
    6.6/10(17 votes)

    #25 - The White Mermaid

    S1:E3

    The girls discover of an ancient mermaid statue and return it but treasure hunters have another idea.

    Director:Unknown
    Writer:Unknown

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Best Episodes Summary

"Memory Lapsse" is the best rated episode of "H2O: Mermaid Adventures". It scored 8.6/10 based on 18 votes. Directed by Unknown and written by Unknown, it aired on 10/2/2015. This episode scored 0.3 points higher than the second highest rated, "The Mysterious Seaweed".