whitetip shark: smooth dogfish of Pacific and Indian Oceans and Red Sea having white-tipped dorsal and caudal fins
elasmobranch: any of numerous fishes of the class Chondrichthyes characterized by a cartilaginous skeleton and placoid scales: sharks; rays; skates
purgatory: (theology) in Roman Catholic theology the place where those who have died in a state of grace undergo limited torment to expiate their sins