Portal:Sharks/Did you know/6


 * ... that the taillight shark has a gland on its belly that releases clouds of luminescent blue fluid?
 * ...that the Jersey Shore shark attacks of 1916 killed four people and inspired Peter Benchley's novel Jaws (1974)?
 * ... that the presence of the rare bigeye sand tiger in the Pacific Ocean was first suspected based on teeth recovered from the ocean floor?
 * ... that the rough skin of the nursehound was once used as an abrasive called "rubskin", which cost a hundred times more than sandpaper?
 * ... that the epaulette shark can survive for an hour without oxygen?