Very nice. I'd second Trif's request for a clearer description of the Corva - in the writeup you say they have 2 legs and 4 arms, but the hit location shows 4 legs and 2 tentacles, which makes them a bit confusing to visualise.
Also, I was doing fine thinking "these guys are like octopuses" until it seemed they can also speak "sonically" - perhaps indicate how they do this, and perhaps give a biological note. Everything else seems very well derived from established biological principles, it just seemed a bit weird that you've got a squid-like aquatic beastie with a voicebox - I'll buy it, I just want a description!
As far as the whole thing goes, though, it's very nice. You get a good SF feel from the character writeup, and the racial background is very alien, which I like (I tend to dislike Space Cats and Space Dogs...
- I like my aliens to be ALIEN).
I'm intrigued - do humans fit into this milieu? If so, how? What's the campaign flavour like?
Cheers,
Sarah