Howdy y'all, I've spent quite a bit of time looking for an answer to my question before inadvertently duplicating previous threads, but haven't found one that matches exactly what I'm seeing. I noticed one of my crabbies almost all the way out of his shell. He was on the side of the tank where there are not any spare shells for him/her to change into so I don't believe it was in the process of doing that. Also even though I could see its... hidden legs that are normally well inside the shell, it wasn't quite all the way out. I noticed this pulsating on the side of his abdomen... not sure what that is... breathing maybe??? The difference here from the many other posts that I did find is that my crabbie is not lethargic or sluggish at all. I got in really close to the tank to get a good look at it and when it saw me it tucked right back into its shell and scurried for cover. I just checked it again and it's hiding in the tree trunk hollow and its antennae are flitting about wildly. The temp/humidity are both right around 80 +/- 1-2 degrees. Water clean, food just changed. There is some condesate on the inside, but not excessive. I guess I'm just confused. Anyone seen this type of behavior before? Should I be concerned? If it weren't so quick and alert I would be concerned, but I'm not seeing that at all.