I could watch it for long stretches of time. As a kid there was a tropical fish store near where I lived and I would go in there and see rows of dazzling fish and coral and so on -- like this but illuminated because the room was otherwise dark. I even took paper route money to buy a tank. I was too young and irresponsible to do it right and learned my lesson. But I still love to see aquariums.
I don't know if classical music is your thing, but Saint Saëns composed a short piece called The Aquarium. Turn on the volume if you check out the link.
https://www.youtube.com/watch?v=oCUtOKsmOZ8
"Not a bit is wasted and the best is yet to come. . ." -- remembered from a dream