Can fish do math?

Dyscalculia: News from the web:

Dr Butterworth wrote a book called “can fish count” ;Now a study from Germany’s University of Bonn tested the mathematical abilities of several freshwater stingrays. The researchers showed a fish a card containing four shapes, such as small circles or squares. All the shapes were blue. They then showed it two new cards: one with three blue shapes and one with five. If the fish touched its nose to the card with three shapes, it went away without a treat. Touching its nose to the card with five shapes, however, earned it a treat. Over time, the fish learned that blue shapes on the original card meant it needed to “add one” to the original number of shapes.

Read all about it: HERE