Currently available on 3 streaming services.

Streaming, rent, or buy H2O: Mermaid Adventures – Season 1:

Currently you are able to watch "H2O: Mermaid Adventures - Season 1" streaming on Netflix, Netflix basic with Ads or buy it as download on Apple TV.

Cast

Katharina von Keller
Emma (voice)
Patrick Bach
Lewis (voice)
Sonja Stein
Cleo (voice)
Robert Missler
Bernie (voice)
Céline Fontanges
Rikki (voice)