Even bigger than the trex, Spinosaurus has a crocodile like mouth and eats fish. It will fish for itself so does not require any sort of feeder in it's enclosure.
This dinosaur is untamable. Spinosaurus is a lot like the T-rex in this mod, and can break through blocks weaker than iron. That means no dirt enclosers for this dinosaur! Spinosaurus can't be hurt by arrows, and is pretty hard to kill, so be careful and approach slowly. If this dinosaur gets angry it will kill you with 2 hits. It may be tempting to try to ride the Spinosaurus, but do not. Whipping near it is an instant aggravation, so never do that. The only way to kill it productively is to dump lava on it and finish it off with a sword.