I loved watching fishes, big and small, in all colours moving behind the glass. There are so many of them and so few of us humans, I feel like we were being watched instead.
The favorite part of any visit is the travellator through a glass tunnel. The inside of the tunnel is dark, illuminated only by sunlight filtered through the water above my head. When I looked up, there they are, sharks. We usually catch a glimpse of these predators from afar. As soon as we spot the triangular back fin, we run for our lives. But here in the tunnel, I was under their bellies.
On the travellator, I would walk in reverse direction, so I would never exit. I walk and I wait, for my favorite to appear. You guessed it. The hammer head shark, from the underside, is but a frowny guy.