Freshwater fish are easier and cheaper, especially goldfish.
After seeing this as a hobby, I have decided against it. I have freshwater fish at the moment. All they require is occasional water changes and food. Anything more time consuming than that I do not have the time for.
When you're done with the titanic you should put it at bottom of aquarium :Dwell, ofcourse if you don't want it to sink another time, don't do it.
GET A SHARK. WE CAN FEED THE NUBLETS TO IT.