Here are some of the reasons why a snakehead would likely win a fight against a piranha:
* Size: Snakeheads can grow up to 3 feet long, while piranhas typically only grow up to 1 foot long. This size difference gives the snakehead a significant advantage in a fight.
* Jaws: Snakeheads have powerful jaws that are lined with sharp teeth. These jaws can easily crush the bones of a piranha. Piranhas also have sharp teeth, but they are not as strong as the teeth of a snakehead.
* Aggression: Snakeheads are more aggressive than piranhas. They are more likely to fight for food and territory, and they are not afraid to attack larger animals. Piranhas are more likely to flee from danger than to fight, and they are not as well-equipped for fighting as snakeheads.
Of course, there are always exceptions to the rule. If a piranha was particularly large or aggressive, it might be able to defeat a snakehead. However, in most cases, the snakehead would be the winner of a fight between these two fish.