Evolutionary theory assumes that all organisms are related in some way. Yet some life forms have a unique makeup unrelated to any other. One example is the octopus mating arm.
It’s common knowledge that an octopus has eight arms. What is less known is that one of those arms, called the hectocotylus, is the octopus mating arm. The male uses the other seven arms for hunting and exploring, but generally holds the hectocotylus close to his body when not mating. The female octopus has a mantle, a structure behind the eyes that houses all her organs. The male octopus reaches into the female’s mantle and feels around until he finds her ovary. He then slides a sac of sperm down his arm and deposits it.
It’s interesting that the male cannot see what he is doing, so the female helps by secreting enzymes that produce the sex hormone progesterone, which attracts the male octopus mating arm. The octopus is a highly visual animal in every other part of its life, but its reproductive system involves no vision. Each octopus species has its own chemical signature, so there is no interference in the reproductive system from other species.
As we learn about the octopus and its reproductive system, it seems that God has left His signature on this animal, showing that an engineer designed life. No chance explanation can easily account for how octopus reproduction originated. Romans 1:20 tells us that we can know there is a God through the things He has made.
— John N. Clayton © 2026
Reference: Scientific American, June 2026, pages 16-17.