Fish have brains but not cognitive ability. Their actions are the result of instinct and memory....not analytical thought processes.
Quote:
Originally Posted by chachi  If you think about it if they eat, sleep, search out food, breed they have to have a brain. I know my betta does he follows my finger when I move it along the glass |
Not that your betta isn't the most intelligent betta ever...
..but bettas are territorial he sees your finger as an intruder and/or thinks it's time to eat.