my watchman goby has a hole on his side thats been getting bigger and deeper into its body im pretty sure its done for cause i dont really have any medication or quarantine tank set up but just want to know if anyone knows what it has? its still eating but it looks like its getting worse, im only relying on it healing itself. i saw my cleaner shrimp picking at that spot a few days ago when it wasnt that bad on the spot but now its getting worse and the goby doesnt let the shrimp near him anymore.