Yes. I volunteered at an aquarium for several years, and we spent a surprising amount of time learning octopus etymology. It was a top 10 question for adults to ask.

Octopus entomology? I think you meant etymology.

Octopus entomology sounds a lot more interesting

You have to admit though, octopus entomology /would/ be surprising.

Yes, whoops!

yes, they are almost the same

the greek d was actually a hard th sound iirc, Δελτα being pronounced 'thelta' as opposed to 'delta'.

hopefully that clarifies (and is actually accurate) how octopuses and octopodes are connected