Thanks for posting. In some ways it shows how little we know, when talking about intelligence we don't group birds or mammals together because we know there are massive variations between species, yet all 25k + species of fish it's ok.
I think us hobbyists kind of already knew that fish aren't daft. I wish they were stupid sometimes, that way whenever i went to the local lake for a few hours fishing i'd fill my net!!!! They're crafty devils all right.