Looks good, Joao. I can kind of see a dolphin head with a bit of a long nose among many other possibilities. Real nice lines and textures and the processing looks good, too.
Really abstract image Joao. I love how the sand ripples and lines mimic that of the rock. They are all hard edge and straight randomly running in all directions. This is the type of image that you can look at for a while and get lost in. Would have liked to see a little but more room in the ULC so the rock isn’t quite so close to the edge of the frame but it certainly still works. Well done!
This image has an almost pre-historic look to it, like it’s a fossil of some kind. Love the diagonal rock, this is the perfect angle of view for this scene. I agree with @David_Haynes about wanting so a bit more breathing room in the ULC, not much, just a little. Maybe Content Aware Fill could accomplish that if you don’t have it in the original.
A very striking image, João! B&W was a good choice as it magnifies the textures, lines and shapes which is what this little scene is all about. I like how the small cracks and fissures on the rock echo the larger channels in the sand. Nicely done!