Mako Mermaids S1 E17: Moon Ring 2 (short episode)

When Zac finds a ring on the ocean floor and gives it to Evie, Sirena sees it is a Moon Ring, and the mermaids attempt to recover it before Evie wears it in

Mako Mermaids S1 E17: Moon Ring 2 (short episode)

Mako Mermaids (TV Series 2013–2016) - Episode list - IMDb

Mako Mermaids (TV Series 2013–2016) - Episode list - IMDb

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Mako Mermaids: Moon Ring 2, S1 E17