That would be some dead space shit

bruh. I wake up and see this shit.

... or some Dune stuff: "They are Shai-Jello'd, the old gummies of the dessert."

Or the worms might be gentle giants and choose to act as a kind of subway system, helping the bears get from place to place. Which is difficult for the bears normally, because their legs are too short and fused together to actually move well at all. The bears in turn occasionally sacrifice a member of their kind to feed the worms' appetite, and keep them from rampaging and feasting on the flesh of their children.
.
It's a peaceful co-existence
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The gummy sharks are a different story

I want a world with teeny tiny bears I can keep as pets.

Attack on Gummy