It was upside down when I pulled it out of the styro and it didn't last long while I let it acclimate to the temp.
FWIW, if a fish is dying, skip trying to acclimate them! Typically it's either an ammonia or an O2 issue, so getting them into fresh water ASAP is best.
As for bags not labeled as having O2, bagging with O2 is nice, but not necessary and fish will still last a long time if bagged properly. I try to avoid bags that look too small for the fish they are holding, bags with lots of poop, cloudy water (ammonia issues), or bags filled with too much water (typically 1/3-1/2 is a fair amount - beyond 1/2 and I skip them unless they are known to be breather bags (bags which let O2 pass through the plastic).
