The Neomorph(Spoilerish)

It wasn't fully explained, but Div'Ed said something about blowing/breathing on it and that you had to get real close to it.  Obviously he thought he had a connection with it but we never got to find out if it was tame or if it would have ripped Div'Ed's Ed off because Oram shot it.

The Neomorphs that we see in the film are a natural outcome of the pathogen on the environment. Later on in the film, it is revealed that David tampered with these microscopic "motes" using reproductive eggs from Shaw, and evolved these egg sacks and spores into the Ovomorph and Facehuggers that we see in the film 

I purposely skipped parts of posts here. I am thinking there is no acid blood. Is that true?