I still wonder…
What did these giant ribcages belong to..?
The skull reminds me of a lizard (bearded dragon? sand lizard?) skull but it’s hard to say without the lower jaw and this krill was determined to stop me checking it out properly.
Looks a bit small compared to the ribs though… And lizard ribs are flatter. These ribs are very rounded.
Sky concept art showed turtles… I can see it as some form of giant turtle skull but still the ribs/torso don’t work. Turtles/tortoises have freaky skeletons.
The ribs are very ‘mammal’ but the head is pretty 'reptile’. Could be two separate skeletons I guess.
Bonus. There’s a krill blind spot in the skull. You can just chill inside it and watch krill pass through the giant empty eye sockets.