Mako Mermaids: An H2O Adventure
Mako: Island of Secrets (original)
Starring Chai Hansen, Dominic Deutscher, Gemma Forsyth, Rowan Hills, Kerith Atkinson, Brooke Nichole Lee, Isabel Durant, Allie Bertram, Linda Ngo, John O'Brien
Watch "Mako Mermaids: An H2O Adventure" on Netflix released in 2013. It's a drama and action & adventure show, and has a rating of 6.8 out of 10 from Imdb which is usually fine for this kind of show.
Netflix
