Sugest how to improve negative space

Most of my Hermit Crab shots seem lacking in contrast from the background. Should I try to compose shots with a darker background? Or, should I just look for the rare darker shell that happens to have a crab in it (prety rare in my neck of the woods). Photoshop tips also greatly appreciated.

Thanks, Doug

 

Most of my Hermit Crab shots seem lacking in contrast from the background. Should I try to compose shots with a darker background? Or, should I just look for the rare darker shell that happens to have a crab in it (prety rare in my neck of the woods). Photoshop tips also greatly appreciated.

Thanks, Doug

Try an "S" curves adjustment in Photoshop. That makes the crab "pop" a bit more, and a bit of vignetting also brings out the crab.