We all know that the male octopus uses his third right arm as a penis. (Oh, you didn’t? It’s true. Sometimes he even detaches it to give to the female.) In fact, all of the arms, if not so specialized ...

There are at least 300 known species of octopuses. “Over the past 30 years, various studies have explored different methods to age octopus, but only a small number of researchers worldwide have the ...