Does green blood exist? © Getty Images

Does green blood exist?

It's not a dietary supplement for vegan vampires.

Asked by: BBC Focus Magazine

Advertisement

Yes. Instead of the haemoglobin used by vertebrates, molluscs and some crustaceans use a greenish-blue, copper-based pigment called haemocyanin to carry the oxygen in their blood. There’s also a genus of skink, Prasinohaema (which means ‘green blood’ in Greek) that accumulates the bile pigment biliverdin in the lizard’s blood, which is bright green as a result.


Advertisement

Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.