The image depicts
a surreal scene with two animals in an underwater setting. On the left side, there is what appears to be a large rat or rodent with a crown-like structure on its head, standing on rocks. To the right of this creature is another animal that resembles a dog. The water around them has a greenish hue and they seem to be in
an underwater environment with decaying tree branches and other debris scattered around. The skull that you mention could possibly be referring to
the rock formation or some part of the underwater scenery, but it is not the main focus of this image.