Did Researchers Teach Fish to “Do Math”?
arithmetic, bees, cichlids, counting, fish, food pellets, infants, Intelligent Design, neuroscience, Neuroscience & Mind, numbers, Rafael Núñez, Silke Goebel, Sophie Fessl, stringrays, The Scientist, UC San Diego
Some test fish learned how to how to get food pellets but the difficulty, as so often, lies with interpretation. Source