what color is an octopus blood
What color is octopus blood? Both squids and ocÂ­toÂ­pusÂ­es have blue blood. They use an oxyÂ­gen-Â­carÂ­ryÂ­ing molecule in their blood called hemoÂ­cyanin that contains copper. In cold conÂ­diÂ­tions with low oxygen presÂ­sure, hemoÂ­cyanin oxygen transÂ­portaÂ­tion is more efÂ­fiÂ­cient than heÂ­moÂ­gloÂ­bin oxygen transÂ­portaÂ­tion. Sea animals quizColors quiz.