Outcastsmako Mermaids : Season 1 Episode — 1

: Because they failed in their duty, the girls are cast out by their pod as it flees Mako Island to find safety elsewhere.

: The moon's power transforms Zac into a merman with a blue tail and the ability to manipulate water. OutcastsMako Mermaids : Season 1 Episode 1

: Zac discovers a secret cave on Mako Island, which contains a trident-shaped symbol that triggers the floor to disappear, leading him to the Moon Pool. : Because they failed in their duty, the

: The show establishes that mermen in this universe have blue tails, distinct from the orange/gold tails of the mermaids. OutcastsMako Mermaids : Season 1 Episode 1

: While the pod is celebrating, the three girls fail to prevent a "land boy" named Zac Blakely from falling into the Moon Pool.