It's been a while since any porbeagle sharks were landed on the market in Newlyn. They have been on the banned list since 2011 as a result of overfishing, mainly targeted by Norwegian longliners in the 50s and 60s. These days fishermen release any porbeagles that are taken as a by-catch - though it has been some time since any were reported.
Sharks are an interesting species - they have been around on the plant for some time - in terms of evolution, we as humans are closer cousins to salmon than the salmon is to the shark - by a considerable margin - as a species, they pre-date trees and dinosaurs by millions of years!