Even seasoned cephalopod-watchers can have a hard time distinguishing some species of octopus from other, similar species, especially among deep ocean creatures that are rarely seen.
Now American researchers have spotted a tell-tale difference between two closely related species, Graneledone verrucosa (found in the Atlantic ocean) and Graneledone pacifica (found in the Pacific): The Pacific ones have more warts.
“This study should make future octopus analysis easier and more rigorous,” says Janet Voight of the Field Museum in Chicago, one of the researchers.
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