No Blue foods on the planet?

Besides blueberries (which are actually a bit more on the purple side) can anyone think of any naturally blue foods? By naturally, I mean not dyed or artificially altered.

There are some blue / purple potatoes.

I have no idea.

Theere is a type of crab that is naturally blue I assume you can boil and eat it

Blue Cheese kinda

Purple Cabbage turns blue when cooked and refrigerated

Blue/Purple Corn

Blue Lobsters

You know the color blue has thi history about possibly not appearing in nature until recent times ...(Long story)

You're answer may lie here

http://www.radiolab.org/story/211213-sky-isnt-blue/

or

here

http://www.colormatters.com/color-and-the-body/color-and-appetite-matters

i once ate some blue-ish green meat

Dead bodies can be blue.

Blue man group.

I'm a cannibal, but I was born that way so all you LGBT supporters have to support me. Now get me rights to marry another cannibal. Then we can eat our kids.