I recently saw this sketch https://www.furaffinity.net/view/54309503/ and was immediately inspired to write a little spinoff. Then my friend  Atanor got in on it and made a quick coloured sketch of the scene, sporting his dragon Astreys. It seems he still has a sweet tooth (or 28) for seafood.
The orca was my surprisingly entertaining to write, so I made her into a new character. I am still mulling over the details, but expect to see more of her eventually.

Team mammal, my (draconic) ass
(silly nestled vore)

“Oh god, please don’t eat me, please don’t eat me!” Sandra kept screaming, as the white shark’s jaws sucked her in deeper and her bare skin was scraped by the faintest touch of his razor sharp, serrated teeth.
“Don’t worry, I won’t bite if you don’t make me.” the shark chuckled and once more his jaws opened, leading to his throat expanding around her kicking feet, which were then sucked deeper. She was trapped now, running out of air and slid ever deeper into the frightening maw that seemed eerily adept at consuming humans.
“God, please no! I don’t want to die!” she shrieked and her squirms ceased entirely when those death promising inch long teeth pushed into her flat belly. One wrong move and her guts would spill freely into the ocean.
“It's nothing personal, Snack. Just the food chain at work. A shark’s got to eat after all. This will only take a moment now.

When the white shark swallowed her deeper and his maw closed again, he nearly split her tits horizontally when he heard a frighteningly high pitched voice right behind him.
“About that food chain!” it chirped and before he had time to look backwards he already felt a soft tongue and a firm palette squish down on his lazily undulating caudal fin. This could only mean one thing and when he looked back, half his view was taken up by the smug black and white visage he had feared to see.
“Come on, can’t you just go for a few seals like the rest of your pod?!” he snapped at the famously shark consuming orca cow who had just taken hold of his tail. She giggled excitedly and her uncomfortably warm tongue wrapped around his powerful tail like a big slimy hand and pulled him backwards. Against his best struggles, he was dragged into the entrance of her throat, just like the swimmer in his, he was now locked on a path to digestion.
“I could, but you white sharks are so much more filling. So fierce, so proud, yet so easily distracted and caught. Hope that morsel was worth it because you are going to blubber town.”
Another swallow pulled the shark deeper. His superb spatial vision allowed, or cursed him to see the bulge of his tail forming underneath her maw.
“You are not even supposed to be able to gulp things my size!” he tried to argue and when he thrashed his tail, her huge body merely bobbed and emitted an amused little moan.
“You have no idea how often I have heard that. Once you join my blubber you will meet many other sharks that thought the same. Besides,” she gulped again, taking him to his lower belly now. Her maw stuck wide open as it crept over his girthy frame. “You don’t really prefer me calling the others to pluck you apart first, do you?”

“Yass!” cheered the girl stuck in the shark’s jaws. “Go team mammal! Thank you Mrs. orca, please please make him spit me out.”
The shark scoffed at that. Team mammal had been on his menu for decades except two or three species of cetacean, one of which was sadly currently feeding on him.
“I prefer my sharks well stuffed, sweetie.” hummed the orca as she quickly gulped the shark so deep his dorsal fin slipped through the toothless front of her upper jaw and then got folded down by her descending palette. Her hot, sliy and very malleable gullet seemed to stretch with limited efforts around the nearly meter wide shark. Soon his thickest part was stuck in her throat and he descended virtually on his own from there, his struggle only aiding her in consuming him, as she pointed out with mirth.
“Good sharky, I don’t even have to stretch my throat myself. Aren’t you eager future blubber?” she mocked. “Let me show you what a REAL apex predator looks like from the inside.”

“Thank you, I could not have come up with a better introduction myself.” rumbled a deeply amused voice behind all of them. It was now the orca’s turn to cry out in shock and turn around, as much as her shark stuffed throat allowed her to and stare at a green scaly figure which was swimming with huge wings much like the stingrays she loved to eat as a youngster.
“No fair! Dragons are not even aquatic predators, let me go, you have no business being here.” she cried out. The shark and the human both hoped to get free in the whole commotion, but it turned out that feral predators used to a top spot in the food chain reflexively held onto rewarding, tasty food items.
“You have no idea how many times I heard this line from creatures I added to my pudge.” he quoted her and his long tongue wrapped around her tail and pulled her into his oppressively hot gullet while one of his arms reached around her seven meter long body to push the human into the shark, the shark into the orca and the orca into his maw, where she belonged.
“You know we dragons are a territorial bunch. Some of the sharks you ate were on my menu too, some were actually fun lovers. Now observe me removing unwanted competition from MY food chain in MY ocean.”
With that he pressed against her melon with an extended claw, showing off the total lack of effort and seriousness in his consumption of a five ton orca. With a few easy gulps she, and by proxy her nestled belly contents, were spreading out the thick chutes on the dragon’s throat. One gap after the other was widened to reveal white skin before resuming its usual position as his meal travelled down. For a second his prey disappeared behind his ribs, only to reappear as a rewarding, drooping bulge in his thoroughly amused midsection.
“If it is any consolation, my kobolds will love it when I regurgitate all your bones as a challenging puzzle.” he snickered and kept on swimming, as the dragon that was not supposed to be in the water, filled with the orca that was not supposed to be that stretchy, filled with the white shark that was not supposed to prey on humans, filled with the girl that really should have stayed in bed today.