Aquatica: Duellum

From BoardGameGeek:

New Aquatica in a duel format: deeper, meaner and more intense. Choose a Turtle King or a Squid Queen and improve your underwater realm by playing action cards and assembling locations on three-layered boards. After decades of turbulent times, it is time to unite the underwater world under the fin or tentacle of a single ruler! New layer of depth is brought to the game by the dynamic market on a vortex board. Be careful! The game can end not only when all players achieve their goals but also based on who is the fastest to collect the crowns. Tension is added by the tug of war mechanic. Also, mantas will finally have the company of equally charming squids and turtles. -description from the publisher