Blood oranges are a deliciously sweet and vibrantly coloured citrus fruit with a horrific moniker. They’re a little smaller than regular oranges, with a thick, pitted skin that may or may not have a reddish blush, but they look like other oranges on the inside. The flesh is a bright dark pink, maroon, or dark blood red on the interior. Citrus plants in warm, temperate areas produce blood oranges. They are grown mainly in California and Florida in the United States and then shipped.