He's not sure jellyfish are actually capable of enjoying themselves, given they have no brains. They certainly don't seem aggressive, but he would have been particularly surprised if they had been. "No, I don't think I would have reached that conclusion. They seem perfectly harmless. Quite interesting to watch, though."
Giles could see sky jellyfish watching becoming as popular a hobby as bird watching. He might even go as far as to call it almost relaxing.
He glances at Remy and if he notices his unusual eye colour, he has the tact not to mention it. Then, as if suddenly realizing, he extends a hand and introduces himself. "My apologies. Rupert Giles, uh, Giles, to most."