Ocellaris Clownfish

Clownfish are the most popular saltwater fish there is.
Almost all varieties are now captive-bred, and they will often try to breed in the aquarium.

You can have one, a pair or a large group, the largest in your tank will become female with the second largest becoming male.

The Ocellaris Clownfish are now available in many hybrid colors, i.e. platinum white, davinci, picasso, black storm, etc. and different varieties can be kept together, but you should only have 1 type (ocellaris, tomato, maroon, etc.) per tank unless it is a very large aquarium where they can have their own separate territories.
Clownfish are super hardy and peaceful to most other fish.
They do not require an anemone as a host but can accept one that they'll feed and take care of in exchange for protection.
They usually live 8-10 years and should be fed a variety of dry and frozen foods 1-2 times daily.