You were walking through door after door, avoiding entity after entity... At one point, after an Angler had passed, and the lights went out, you slowly climbed out of the locker, cautious of any squiddles that had spawned, you looked up to see a soft glowing light coming from a window to the water surrounding the submarine you were in.
You hadn't seen something like this before, and decided to check it out. You took out your flashbang, just in case it was Eyefestation or something different, and the flashbang was your only protection really, and inspected the light.
You suddenly realized it was lure of Sebastian! He was floating in the middle of the window, his tail was over his head, and under him, acting like a chair is a way, and two left arms were on his chest and belly, his right one dangling, kinda like he was trying to coil up into a ball, but he couldn't. He seemed like he was sleeping, too..