this blue crab is clearly having an identity crisis
This purple blue crab isn't as uncommon as you'd think, and may owe its purple hue to a genetic mutation. (BONUS: what sex is the above crab?) Another purple blue crab was caught a few years ago and said to be a Baltimore Ravens fan, but that's just ridiculous. All blue crabs are Chicago Bears fans, regardless of their pigmentation. I know this as fact.
See? This is an actual photograph from National Geographic showing the
blue crab's Bears preference. (Well, maybe the Bears logo is from here.)
Anyway, we've seen other odd-colored crustaceans with an albino blue crab here and a blue lobster and half-and-half lobster here. What you may not know is this blue crab was just trying to fill out the rainbow: