Mako Mermaids: An H2O Adventure (2016) - Netflix

This "H2O" sequel follows Zac, a boy who accidentally turns into a merman and threatens the existence of three young mermaids who guard Mako Island.

Watch Mako Mermaids: An H2O Adventure

Watch Mako Mermaids: An H2O Adventure

Mako Mermaids (TV Series 2013–2016) - IMDb

Watch Mako Mermaids: An H2O Adventure

New on Netflix: May 2015 - Longmire, Mako Mermaids

Watch Mako Mermaids: An H2O Adventure

Watch Mako Mermaids: An H2O Adventure

Review - Mako Mermaids (2014-16)

Watch Mako Mermaids: An H2O Adventure

Watch Mako Mermaids: An H2O Adventure

Mako Mermaids: An H2O Adventure - Where to Watch and Stream - TV Guide

New On Netflix USA - Mako Mermaids: An H2O Adventure [Season 4 Added] This H2O sequel follows Zac, a boy who accidentally turns into a merman and threatens the existence of three