In our aquarium here in Albuquerque, they have these ceramic dolphins suspended over a walkway, and because they look like they are flying away, and because I am a nerd, they never fail to remind me of So Long and Thanks for All the Fish from the Hitchiker's Guide to the Galaxy. (I tried to link to the song from the movie version of Hitchiker's, but YouTube was being weird. If you've never seen it, do yourself a favor and go find it. Right after you buy the books.)

I also sort of always want to point out to someone in the aquarium administration department that there aren't actually any dolphins in the aquarium, and that by hanging these up on the ceiling, they are just calling attention to the unfortunate lack of dolphins that people would not notice otherwise. But that would probably be a more complicated conversation than anyone at the aquarium wants to have. With me, I mean.
