I guess... I have no clue!
I took a friend to Petco today to get a new fish, and I ended up coming home with another crabby! This tends to happen to me a lot, lol.
But in my defense, Petco has all their crabs for $4, even the jumbos! I guess it's because they're remodeling. Idk. I really wanted a jumbo, but I just don't have the set-up for them. Yet. Teehee.