Our Bloody Pearl

The ocean is uncontrollable and dangerous. But to the sirens who swim the warm island waters, it's a home more than worth protecting from the humans and their steam-propelled ships. Between their hypnotic voices and the strength of their powerful tails, sirens have little to fear.
That is, until the ruthless pirate captain, Kian, creates a device to cancel out their songs.

Perle was the first siren captured, and while all since have either been sold or killed, Kian still keeps them prisoner. ...