• Brainly User
The largest predatory fish- Great white shark.
The largest fish- Whale
The shark is the largest PREDATORY fish but whale is just the largest fish. There is a difference. 
Experience,size and speed becomes a factor and even intelligents can be an issue.Killer whales actually kill whales that are alot larger them ,even though other orcas help.The orca is alot larger smarter and faster then the shark.Orcas kill great whites for the liver.I never heard of a great white killing an orca.Great whites kill animals smaller then themselves and leave larger animals alone.Great whites dont hunt orcas.Orcas hunt great whites.An orca will kill a great white because of its size and experience and strength.Orca vs shark is like lion vs lepeord because size does matter.