One heart pumps blood throughout the body and the other two move blood to the gills, according to the nonprofit National Wildlife Federation. Like some other marine animals, octopus blood is blue.

There may be many types of octopus, but they all have a truncated anatomy. One reason why these ... The multiple hearts ...

and experts believe this might be one of the reasons why octopuses need more than one heart. With such unique anatomy, you might think that the octopus can live forever. But the sad truth is that ...

Deep in the ocean’s cold, dark waters lives a species of wide-eyed octopus that will surely warm your heart with pure cuteness ... dark aquariums in order to study their internal and external anatomy.

Figure 1: Octopus anatomy and gene family representation analysis. Mechanisms other than whole-genome duplications can drive genomic novelty, including expansion of existing gene families ...