animal tf story underwater saved

two small kids were on a cruise ship when the boat encounters another ship at the deepest part of the ocean it knocks the kids into the water and everything think they drown but as they start to drown a whale appears and then takes them away when the kids wake up thinking they had died they see the whale and look at their bodies which are now that of younger whales the adult says that it saves people from dying by using magic on them to make them whales but they won’t be hjuman again they were ok with this.