Bobbit worm, Eunice aphroditoisBesides looking interesting, the bobbit worm has an interesting feature. It's hemoglobin is extracellular.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1164035/
Hemoglobin is the oxygen carrying protein in our red blood cells (RBC), i.e., it is intracellular. What that means is, unlike our blood, the bobbit worm has free hemoglobin; just floating around. That might not seem amazing to you but here's why it is amazing. In mammalian blood, hemoglobin is protected from oxidation inside the RBC by many other proteins You've seen iron rust. That's oxidation and hemoglobin's oxygen binding component has iron. When iron is oxidized it can generate free radicals which are toxic. That's why you hear people recommending anti-oxidant rich fruits/vegetables. When iron is oxidized and creates free radicals it is called Fenton chemistry.
http://en.wikipedia.org/wiki/Fenton's_reagent#Fenton_Reaction.28Medicine.29
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