The Last Stand is an addon project for the Sins of a Solar Empire, aiming to provide additional and original content, depth and challenge to the game, including three new races, new gameplay elements and tactical gadgets such as mines, interdiction abilities, deployable starbases, new ship classes and more.
Looks like a manta ray.
Nope, the Assault Cruiser (this is a carrier cruiser) will look like a manta-ray. ;) But yeh, the Xin follow aquatic themes closely. After all, they grow their ships underwater before shipping them off into space. ;)
HAHAHA that idea was taken from Bab 5 and Star Trek