An argonaut is a weird kind of octopus. The size difference between males and females is enormous. How big is it?

Explanation

An argonaut is a weird kind of octopus. The size difference between males and females is enormous: females can grow to be 10 cm long with 45 cm long tentacles, while males rarely surpass 2 cm. The males produce a ball of sperm in a special, modified arm, the hectocotylus. When he meets a female, he releases this arm, which then swims to the women.