Ok the picture below, doesn't tell the whole story.
The hermit in the bigger shell below was investigating this shell as a possible home. While out of his existing shell, another hermit came along and hijacked it, leaving the smaller shell in the pic behind.
As you can see this hermit was battling to move this big shell and finally went back to where his old shell was and couldn't fit into the smaller shell, now he is crawling around with no shell
Weird creatures these crabs
The hermit in the bigger shell below was investigating this shell as a possible home. While out of his existing shell, another hermit came along and hijacked it, leaving the smaller shell in the pic behind.
As you can see this hermit was battling to move this big shell and finally went back to where his old shell was and couldn't fit into the smaller shell, now he is crawling around with no shell
Weird creatures these crabs