Most any aggressive larger fish will kill it.
yes, depending on its size and the size of the other fish.
yes as long the fish mate is bigger than the koi mouth.
if you mean "breed" not "bread" then yes they can
Parrot Cichlids are a man made species of fish. They are the product of two totally different species of Amazonian cichlid developed in a laboratory. Being tropical in their requirements they should...