This is a collab thing I did with  Ghostofyourdad (well, I maybe contributed a few ideas, some small text and the predator, but 98% of it was Ghost's work.)

Food chain:
Oan:  Ghostofyourdad
Lapis:  superorca
Atlas: mine

fluff:
There was a hint of smugness on the sperm whale’s face when he felt the shark slipping into his forestomach. The digestive chamber which was going to do the most work in breaking down his prey and his prey’s prey was nearly two meters deep and almost as long, giving the blue shark plenty of space to fill. Still the shark was more than twice as long as the forestomach was across, so it took a bit of gymnastics for the highly unwilling inhabitant to fit into his final resting place.
Inside that blue shark, the anthro orca squirmed as best as his confinement and pose allowed. He felt ripples washing over him that came from the outside. As if something was massaging the belly that engulfed him from all sides. There was a spot of tightness threatening to break him, just for this to pass as soon as it started, followed by him being mangled into a new uncomfortable shape, still with the shark’s potent acids drooling all over him.
Once his own digestive prison came to rest inside that which just consumed his predator, all the burning juices pooled right around his head, eating away at him and threatening to reach and empty out his skull in the next hour or two.