We see a lot of octopus caught and eaten on the Greek islands. Years ago I read something to the effect that they are more intelligent than we think. Which is not a very pleasant thought when you are chowing down on their arms.
We also see and eat a lot of sheep and have observed how dumb they seem to be. Well a traveller named Alejandro Read has done “some” research and rated the 15 most intelligent animals. Sheep come in higher than I thought at #15 and octopus lower at #12.
See his article at Most Intelligent Animals