anatomy - Does the octopus have an anus? What does it look like?

Octopuses are cephalopods, which have separate anal and oral openings. Indeed, descriptions of the cephalopod GI tract clearly depict an anal opening.

However, I am very confused about how this applies to the octopus. I don't think I've ever seen the anus depicted - where is it? What does it look like? Does anything much come out?

My first instinct would be to simply do a google image search for this. Unfortunately, those results are flooded with unrelated hits (apparently the octopus is a popular motif for tattoos... in a certain part of the body).

Answer

The anus of Octopus is channeled into its siphon. Image taken from Carina M. Gsottbauer

Note:

Siphon is a tube that leads from the mantle to the outside. Octopuses use their siphon to force water out in jets for propulsion and to flush waste products from the anus.

_{From Encyclopedia of the Aquatic World, Volume 6 By Marshall Cavendish Corporation}