8.526 / 26 H2O: Mermaid Adventures Jun. 01, 2015 H2O: Mermaid Adventures IMDb: 8.5 2015 4634 views Watch H2O: Mermaid Adventures full episode online free watchcartoononline. Storyline: When three normal teenage girls stumble upon an ancient ... AdventureAnimationComedyFamilyKids
