What does it mean to dream of an alligator head in a black bag?

The image certainly has negative, and rather alarming, qualities, but the actual meaning of this image depends on its context in the dream and on your own emotions while dreaming. For example, the dream would have one meaning if you unexpectedly stumbled on the black bag and innocently looked into it, but might mean something quite different if you were given the bag by some other dream character. In the one case, it might illustrate curiOSity and mystery followed by disgust, perhaps referring to some area of your real life where you are curious about personal or family information. In the other case, the dream suggests a threat and possibility of danger, and the need to be very cautious about whom to trust.