Behaviours & Protocols

I have an intuitive understanding of behaviours and protocols of course, but after talking with a colleague today, I was surprised that behaviours and protocols are kind of the same thing.

Mainly because protocols are like type classes in Haskell, and if I squint, behaviours are also.

Which you know, is comforting, as I always like seeing links between data (protocols) and code / actions (behaviours).

But, where am I going wrong?

Can anyone explain these Elixir concepts in terms of Haskell, maybe a bit more precision will show me where I am going wrong..

Could I create a GenServer protocol? Or is that completely ridiculous?

I see a related link which is interesting: Why is Access a behaviour instead of a Protocol? When to use a Protocol instead of a Behaviour? - #2 by michalmuskala