Another whale idea

What if: the difference between whales and other voidlife is that the whales are from a matter-based universe and other things are from the void? So only whales have a jump field, etc., and voidlife is hungry for matter (to convert to energy? I'm not sure) so whalefall is a thing in the void as well.

I've also been wondering about how, if exoplasm is the only way to get to voidspace, the first jumps were made. I think the answer is... beached whales. They can't safely sound in the correspondence zone, and sometimes if they do they get stranded/die in realspace, and that's how people learned the trick.

Maybe. Feels like it would take a lot of beached whales to get it figured out, which leads to the question of: how often does/did this happen, anyway?