If you take a closer look, you can clearly see the hidden messages, guys.
Crab is missing an antennae, a vital organ used generate currents through the hairs, bringing smells close to sensory surfaces. Coenobita rely on humidity in the air to aid them in smelling and locating various odors.
Without antennae, the crab wouldn't be able to smell their way to return to their oceanic home. Kojima wants to be a crab that has no antennae, which symbolizes a being that desires freedom and not get locked up by a home. This could be an interpretation that he wants to have total creativity freedom and could imply that he is under heavy pressure from creativity limitation right now.
This is further backed up by the fact that the crab is white. The only time Asian associate themselves with white is when they are feeling pale from sickness. There are multiple ways to look at this , but one of the ways indicate that he's feeling sick.
Put two and two together this could be his secret pled for help that he is under tremendous pressure that he is feeling sick from creativity limitation and he wishes for total freedom.