Previous research has documented that commercial fishing can change gender ratios and drive down fish size by selecting for the largest. (scientificamerican.com)
Fossils found in the Kem Kem have been unusually large: not just Spinosaurus, but also Carcharodontosaurus, a land - based predator nearly as big; crocodilian monsters as long as a school bus; and fish the size of a car. (discovermagazine.com)
Similar studies in marine protected areas located by the Santa Barbara Channel Islands have detected gradual improvements in fish size and quantity. (en.wikipedia.org)