Well, T-Rex is Among the Top 5 Dinosaur Predators of all time, along with:
Gigantosaurus
Spinosaurus
Allosaurus
Herrerasaurus (for its time, but if it was all in all, then Carchardontosaurus)
Velociraptor was near the top, with the exception of a species of tyrannosaur known from fragmentary remains. It may actually be Alectrosaurus, a 17 foot long tyrannosaur. Velociraptor would have to be careful to avoid Alectrosaurus.
Apatosaurus is an herbivore, so it is a primary consumer and thus as low as an animal can be on the food chain. However, because of its huge size as an adult, Apatosaurus may not have been hunted very often.
they ate fish.
The plesiosaur ate mostly fish and plants
It is a food chain.
The Plesiosaur. Some people believe that the Loch Ness is a Plesiosaur.
A Mekong food chain is a food chain of the Mekong region
It was not a dinosaur, but a plesiosaur and the longest plesiosaur. It could grow upto 15 m long.
it would effect the food chain because one part of the food chain is missing
A food chain.
the piranha cannot be at the end of the food chain.
what is a monkeys food chain
food chain on land
food chain of a eagle