http://www.abc.net.au/science/articles/2010/01/14/2792407.htm

“Fish have a memory that lasts much more than three seconds and are capable of deception and learning, say Australian researchers.”

“According to Warbuton, fish are also capable of exhibiting human-like behaviors, such as deception.”

“Fish can recognize other individuals and modify their own behavior after observing interactions between other individuals.”

“Siamese fighting fish will attack other members of the same species more aggressively if they’ve seen them lose contests with other fighters.”