crab 1 is laying there minding his own business thinking to himself how the hell did my arms get so sunburnt. when crab 2 comes up to harass him thinking he is so funny.
crab 2 - "hey bro check out this coraline on my shell, where is yours at??"
crab 1 - "Dude purple is for women, you look like a fag!"
crab 2 - "hey why dont you come out of that shell and say that"
over the course of the evening the trash talking goes on, and a domestic dispute ensued. Crab 1 gets pissed and rips crab 2 out of his shell and left him a beat up mess only to die and get eaten by the rest of the tank. crab 1 would give the shell to his girlfriend because the coraline is a nice purple color, but you and i both know that crabs are too much jerks to be giving away presents so he just took a dump in the hole so that the next crab that decided to make a cozy home there would have a nice surprise!
UPDATE: bad news guys, i heard crab one was tried today for the charges of crabslaughter and deficating in public. sounds like he is spending the next 5 years in the overflow, no lighting, and only whatever gets skimmed off the surface of the water for food. I had my fingers crossed for the guy since he was just minding his own business, but the law is the law. I heard he asked for heavily garlic soaked brine shrimp for his last meal before getting locked away. also he has a possibility of parole. in 2 years he will have his hearing, if he plays it cool.