"I don't drink water. I live in it. Thank you though." The eel figures the stranger's well-meaning. Water's more comfortable than land is. "I'm from the sea. The darkest part of the sea."

The gulper eel lives in the sea, so he knows what it is, though it's land environments that he's unfamiliar with. The light is very useful for seeing in the dark - and in a world of anthropomorphic sea creatures, it has mundane uses like as a flashlight or a reading light in the appropriate situation.

"Cookies? There are cookies here?"