Here's why:
* Leopard seals are apex predators: They are at the top of the food chain in their environment, with few natural predators.
* Penguins are abundant: Penguins are a readily available food source in the Antarctic and sub-Antarctic regions where leopard seals live.
* Leopard seals are skilled hunters: They are powerful swimmers and have sharp teeth and claws that make them efficient at capturing penguins.
While leopard seals prey on penguins, they also eat a variety of other animals, including fish, squid, seals, and even other leopard seals.