Fish can count upto four.
LAPLACE, PYTHAGORAS,FOURIER & EULER are some of the few great mathematicians who showed d uniqueness of humankind’s mathematical abilities but were unknown of the ability of the animal.
Fish can count upto 4 but not higher was found in one of d expt. that involved giving option of diff. sized shaols.
In Italy , Christian Agrillo, an experimental psychologist at d university of Padua , said dat it was during a study on d North American mosquito fish dat their limited mathematical ability of counting upto four was observed.
The researcher said dat d fish used its mathematical ability to countd no. of other fish which is in the surrounding.
This ability of fish is on par with monkeys, dolphins and 6-12month old child.