predator
Biological term for an organism that preys on others. Often contrasted with 被食者 (prey).
See also: 被食者
Lions are predators of the savanna.
捕食者と被食者の関係は生態系のバランスを保つ。
The predator-prey relationship maintains the balance of the ecosystem.
捕食者 is the predator that hunts and eats, the direct opposite of the 餌食 that gets eaten.
apex predator; top predator
Compound of 捕食 (predation) + 者 (person/agent). The term is a straightforward Sino-Japanese construction.