As Astra struggles with the events of the Lunar Eclipse, Sawtooth wrestles over new insight from his past.

To obtain a relic that could lead to the Mermicorno Kingdom, Astra and Gwen journey into a secret vault under the Pearl Palace.

Kameko sets out to find her dad, while Nautique recounts his life post-Starfall with Squishella.

While Ika begins training Dark Pearl, Squishella enters a talent show -- but her determination to win has monstrous consequences.

After discovering she's part of a secret society of turtles, Kameko starts to wonder where she belongs when she doesn't fit in.

When the Mermicornos find a community of fish being bullied, Gwen takes matters into her own hooves.

The Mermicornos finally make it to the Mermicorno Kingdom ... but new revelations threaten to change the Mermi-Crew forever.

The Mermi-Crew set out in search of Valentina ... but soon realize that while finding her is easy, getting her to leave is hard.

Astra adopts a laid-back persona to impress Rip Tide and Sunsprite. Meanwhile, Squishella's jealousy leads to magical mayhem.

After discovering his creative side, Sawtooth must decide if he's a Hench-Shark or a Mermicorno.

As the Mermi-Crew readies to face Ika again, they're met with a surprise that may help their mission ... or cause them to fail entirely.

A cruel deception forces Astra to devise a risky plan to save the Mermicornos from being further torn apart.

In the final battle, the Mermi-Crew must come together -- or risk losing the ocean as they know it forever.