Picked this guy up a couple of weeks ago, seems pretty sedate (did hammer the glass once, but other than that, not too bad). About 5.5" long, currently residing in a 7 gallon bowfront, w/ 4" of sand, and about 7-8 lbs of LR. Has dug a hole, however, spends a lot of time out in front. Has a bit of damage on the back carapace. Also likes to try to kill itself by stirring up sand, which get's sucked into the powerfilter, and stops the impeller, which causes the O2 levels to crash, until I get back to the office and fix it.