Overview
- Clownfish exhibit aggressive behavior towards intruders with a similar number of white stripes, particularly targeting those with three stripes.
- The study, conducted by the Okinawa Institute of Science and Technology, involved both live fish and plastic models to measure aggression.
- Researchers found clownfish less aggressive towards species with fewer or no white stripes, indicating a method to recognize species.
- The ability to 'count' stripes suggests clownfish possess a rudimentary form of numerosity, previously observed in other animal species.
- This discovery adds to the understanding of social hierarchies and territorial behavior in marine ecosystems.