What two animals are each others worst enemies?

This is a bit of a tricky question, as there isn't one definitive answer. It really depends on how you define "worst enemies."

Here are some possibilities:

Predator-Prey Relationship:

* Lions and zebras: Lions hunt zebras for food, while zebras try to avoid being eaten.

* Wolves and elk: Wolves prey on elk, and elk have evolved strategies to avoid wolf predation.

* Sharks and seals: Sharks are apex predators that hunt seals, which try to avoid becoming shark food.

Competition for Resources:

* Coyotes and foxes: They compete for the same prey, leading to territorial conflicts.

* Hawks and owls: They hunt similar prey, leading to occasional clashes.

* Squirrels and chipmunks: They compete for food and nesting sites, leading to skirmishes.

Natural Rivals:

* Snakes and mongooses: Mongooses are known to kill snakes, and snakes are understandably wary of them.

* Bulls and matadors: While this is a staged event, it highlights the natural aggression of bulls towards humans.

It's important to note:

* Most animals don't actively seek out conflict. They mostly interact based on instinct, survival needs, and the availability of resources.

* The relationship between two animals can be complex and vary based on the environment and circumstances.

Ultimately, the answer to your question depends on what you consider a "worst enemy." There's no single pair of animals that universally fits the bill.