If you give an octopus a glass jar that has a crab inside and also has a screw top, the octopus will probably be able to open the jar and extract the crab. What does this tell you about this cephalopod?

If you give an octopus a glass jar that has a crab inside and also has a screw top, the octopus will probably be able to open the jar and extract the crab. What does this tell you about this cephalopod?