Scientists have discovered that male octopuses use a specialised arm, the **hectocotylus**, to sense female hormone **progesterone** and mate without seeing their partner.
The arm acts like a tongue, detecting chemical cues to locate the female’s reproductive organs.
This insight reveals how solitary octopuses achieve reproduction at arm’s length. #MarineLife #Octopus #Sciencehttps://www.theguardian.com/environment/2026/apr/02/sex-octopus-specialist-arm-mating-science