intelligence

I want to get an octopus but don’t know if that is a wise choice. Do they really have a conscious mind and knows they are being boxed in? I’ve seen what appears happy octopus on social media. Do they have short lives? Anyone have an octopus or know about keeping them?

In my sump I have a red mitrax crab and two hermit crabs (different areas). I was hand feeding them fresh scallop meat this morning and I noticed a big difference between the types. The mitrax acted like my hand was a predator and attacked and pinched me. Then moved off into another part of the...