Yes, that is a Golden Crawla. They're temporary until I make new sprites, and they're also going to have a slightly cooler behavior than just moving faster than Red Crawlas. I just haven't gotten around to doing either of those things.
Hell, I'd take those sprites (w/ permission, of course) just because it's better than what I have at the moment. :P
Go ahead and use them if you want, I don't plan on using them for anything anytime soon (if at all).