400 different species over 400 species worldwildlife.org 400 species of sharks over 400 species of sharks WWF more than 400 known species of sharks www.worldwildlife.org/species/shark WWF more than 400 species of sharks shark protector shark section on the WWF website more than 400 known species of sharks 40 feet long to just 8 inches Shark worldwildlife.org