If there were a shark Olympics, these sharks would be gold medalists. They may not be judged like your typical athletes, but researchers have a variety of machines and experiments to measure a shark's size, strength and performance.
Salmon Shark - Salmon sharks generally grow to between 200 and 260 cm in) in length and weigh up to 220 kg lb). [Males appear to reach a maximum size slightly smaller than females. Unconfirmed reports exist of salmon sharks reaching as much a
Tiger Shark: One of the largest sharks, capable of reaching 18 feet. Forced perspective makes this one look a lot bigger. Tiger sharks are Near Threatened with extinction. Probably one of my favourite sharks.