User blog comment:Zxjkl/Where were the salarian ships?/@comment-49.128.170.166-20120520052835/@comment-1388547-20120727205704

I thought the Reapers were in fact pressuring the salarians -- they just hadn't gotten around to assaulting Sur'Kesh yet. There should have been some salarian colonies captured, or salarian minorities present on non-salarian worlds (remember the salarian merchant on Feros? or the salarian workers on Thane's recruitment mission on Illium?). One possible explanation is that the Reapers haven't gotten around to designing a salarian husk yet, and are keeping captured salarians as indoctrinated slave labor instead.

As for the asari, they look very similar to humans, so I'd always assumed that regular Husks might have been asari rather than humans before they were converted. That better explains the ones we see on the Citadel at the end of ME1, and is also an easy explanation for why we don't see a special type of asari husk (other than Banshees, which are specifically asari in the small minority with ardat-yakshi traits). Of course, indoctrinated asari could also just be being held back as slave labor, as well.