I've got many, freshwater, saltwater, etc...
buy a book about maintaining an aqurium BEFORE you buy your tank and fish.
Oscars, African Cichlids, Mollies, Platies, Barbs, Angels, Lionfish, Clowns, Tangs.
"The difference between intelligence and stupidity is that intelligence as its limits"
The pet trade gets a bad rap for exploiting wild animals but sometimes the opposite is true.
Modern advances in technology affect every industry - even the aquarium hobby.
If you are looking for a unique invertebrate to add to your saltwater tank, consider the sea urchin.