Depends on the sex determination system. XY vs ZW vs XO would determine it. XY would mean only female, ZW would mean both, XO would mean both or only one depen

Depends on the sex determination system. XY vs ZW vs XO would determine it. XY would mean only female, ZW would mean both, XO would mean both or only one depending. Not sure what sharks are, some fish are ZW. For the interested, ZW is the inverse of XY, while XO relies on X chromosome count to determine sex.