Intelligent Creatures?

If you read my blog entry for yesterday, you may have thought
“what a load of old squit!”

But, I think there`s also a serious question behind it… do crabs think?

We know that dogs are intelligent and can be taught to do useful things, like guide dogs, hearing dogs for the deaf, police dogs etc. Other animals and creatures show signs of being clever too, like the way squirrels can work out how to get a nut from various tests set for them. Even my canary knows how to ask for a bath, he`ll go to his water, start splashing his beak in it and then start shouting, he`s discovered that if he does that we give him what he wants.

So, do crabs and other sea creatures have brains and intelligence?