Paradox Interactive has announced Stellaris Aquatic Species Pack downloadable content, adding anthropomorphic dolphin people and more to the already massive 4X strategy game.

The Stellaris Aquatic Species Pack is launching sometime soon for the game’s Windows PC version (via Steam and GOG), and will launch alongside the free 3.2 “Herbert” update. You can read more about the 3.2 update here in our previous report.

Here’s a new trailer:

Here’s a rundown on the new content:

Sail the intergalactic seas and uncover an all new expansion packed to the gills with new options for new and longtime players alike. The Aquatics Species Pack will rinse Stellaris with a rising tide of new content, including brand new origins, species traits, civics and a treasure trove of new cosmetics. Seafarers and landlubbers alike will agree that this is Stellaris’ most immersive species pack to date.

Just be careful, sailor…legends tell of dragons in these waters…

Embrace the life of a seafaring civilization as you sail the open expanses of the galaxy with Stellaris’ most immersive pack yet: the Aquatics Species Pack! Dive into the Stellaris galaxy with a sea of new choices, and discover new life where you least expect it. Let a wave of new customizable options for your empire crash into Stellaris, with a treasure trove of new species portraits, ship set, origins and more.

The base game for Stellaris is available on Windows PC, Linux, and Mac (all via GOG, and Steam), PlayStation 4, and Xbox One.