I put my small 17 gallon aquarium together. It's a freshwater planted tank.
I wish I had room and floor support for a 55 or 80 gallon aquarium. I would set up a salt tank. I like lionfish, but I would probably start with butterflies and angels, and/or tangs.
Matthew's 50 gallon salt is beautiful! Someday I hope to have the space. I always wanted to have a clear kitchen floor and have my saltwater aquarium beneath me while I cook. You would need scuba gear to clean it!
Here is a picture of my tank before I added some small fish.

ooooooh nice fish tank. Scuds a boy. Happy New year, we're durkn. Ladycroft and ethearrye
ciao.!