Everything. Anything. More importantly, the surface wasn't underwater, and as disturbing as being at sea and not on a ship was for her in a more general sense, it'd hardly be the only time she'd seen an immense expanse of seemingly unending water. Granted, not in anything close to the same circumstances, and she'd never been in open ocean before, but that was neither here nor there.

Peridot garners a pause and a blink as Ellana considers the person standing before her. All in shades of green, more or less humanoid, on the small side. She opts not to go straight for the what are you, considering being overtly rude when they live in tight quarters isn't the best plan of action. She'd prefer to keep a tenable living situation. She'd also prefer finding something to properly clip up the empty portion of her wetsuit sleeve, but one can't have everything all at once. She'll make do.

"The fact it exists? We can be amazed at the utter nonsense of the constellations topside. We could probably even invent a few of our own and name them, if no one else has gotten around to it yet."

She doubts anyone has gotten around to naming constellations, but it was theoretically something interesting to do. Moreso, it meant reacting to an impetus in a way she chose. Hence constellations. Why not. She's been dragged out of bed to stranger calls than that of this foreign sea.