Perhaps they just don’t like crab meat. So, they are not like humans in that a human can actually be taught. The only thing the Cuttlefish can do is somewhat appear, to the human, to be learning.
The cuttlefish cousin, octopus, is very smart.
A local bar owner, years ago, had a octopus in the bar aquarium.
It would rearrange the objects in the aquarium to it’s satisfaction and the bar owner would put them back where he wanted them.
But the next morning they would be right back where the octopus wanted them.
He finally gave up..................