Are deep sea cephalopod species as intelligent as their shallow-water relatives?

[Megaludon]

Hi all!

This is a questions that has been bugging me for a while, and google supplies no answers. Cephalopods are renowned as extremely intelligent individuals - but does this extend to deep sea species from the mesopelagic to the hadal zones? The resource limitations on food could potentially restrict the development or even the need for the level of intelligence that shallow water species possess, but as cephalopods I wonder if they maintain a degree of intelligence - whether this is social intelligence, problem solving, personalities (similar to sp. rubescens), etc.

Does anyone have an idea of this?

Bonus question; how could we test this? I understand that gathering live samples from those depths is extremely difficult... so it may be limited to observations...

Thanks in advance!

 

[jeffday]

this study sounds relevant to your question - in terms of anatomy shallow water octopods have much more complex brains and visual processing structures than their deep water counterparts:

https://www.cell.com/current-biology/fulltext/S0960-9822(21)01532-3

 

[Megaludon]

this study sounds relevant to your question - in terms of anatomy shallow water octopods have much more complex brains and visual processing structures than their deep water counterparts:

https://www.cell.com/current-biology/fulltext/S0960-9822(21)01532-3

Wow, thanks! That's exactly what I was looking for.