Taken By the Storm King by Elin Wyn

I fell from the stars. He pulled me from the depths.

When our ship landed on the alien world of Sanos, my mission was simple: find a way for my people to survive. But nothing about this place is simple. The ocean hides more than deadly creatures—it hides an ancient kingdom.
And at its center is him.
Thalassar is the storm king, ruler of these waters. He’s fierce, untouchable, and completely alien. But when he saved my life, something awakened between us—something neither of us fully understands.
Now he’s asking me to stay. To become his queen. But his people don’t trust me, and the secrets of his world could destroy us both.
I didn’t come here looking for a mate. But I might have found one anyway.