 At the beginning of the twentieth century a length of nine metres (thirty feet) was seen as plausible, but by its end "Leedsichthys" was sometimes claimed to have been over thirty metres (hundred feet) long.Recent research has lowered this to about sixteen metres (fifty feet) for the largest individuals.Skull bones have been found indicating that "Leedsichthys" had a large head with bosses on the skull roof.