How do fish kill one another?

Fish don't typically kill each other in the sense that humans do. They are driven by instinct and survival, and their methods of "killing" are usually more about acquiring food or defending territory.

Here are some ways fish might "kill" each other:

* Predation: Larger fish will eat smaller fish, this is a natural part of the food chain. This isn't necessarily "killing" in a malicious way, but rather a survival tactic.

* Competition for Resources: Fish might fight for food, mates, or territory, and in these struggles, one fish might injure or kill another.

* Defensive Mechanisms: Some fish have venomous spines or bites that can be fatal to other fish.

* Parasitism: Certain parasites can weaken and eventually kill fish.

Important Note: Fish killing each other is not a common occurrence in the wild. They mostly compete for resources and defend themselves. The vast majority of fish interactions are peaceful, and they rely on their environment to provide for them.