Definitely a fiddler crab

https://image.nostr.build/dcb91190dd3d29fe6f45fe6b15ba4bce02841b737ee4234729e04217f4f8d4a5.jpg#m=image%2Fjpeg&dim=1248x624&blurhash=i7FYDLE1%7EUIT%25LM%7BS5ofr%3F%3FZIU9FM%7CIpkCofoMbc%24_D*D%2Cj%3Fa%23%252t7R*kB9bRj%252xtxZWYWrWBRjt7WCogbbt7M%7CRQxZRk&x=9bd95509bd14dcf6b24d35e578d3d6d1819c336f39301e5ef0fbc279bd617f94