Complex sentence: The saltwater crocodile is a formidable and opportunistic hypercarnivorous "apex" ambush predator capable of taking almost any animal that enters its territory, including fish, crustaceans, reptiles, birds and mammals, including other predators.
Split into simpler sentences: The saltwater crocodile is a formidable and opportunistic hypercarnivorous, apex, ambush predator. It is capable of taking almost any animal that enters its territory, including fish, crustaceans, reptiles, birds and mammals, including other predators.