I was in a cave. I found a rock. I tried to get stone for kore arrows. It wasn't a rock. I died. It was one of these guys sleeping. I bearly made it back and got my still somehow alaive shinehorn.

When i was exploring the island map i saw the chitin cave. I wasn't ready for the cave and i had to run out because i ran past 3 of these things. Good thing it was daytime. Go in the chitin cave during the day just saying

Pet it

How do they know if it’s day or night on the island if they spend all of their time sleeping in caves?

I've seen them in the central cave on the island.