Sweet little clownfish or devil fish.

An Anemone Clownfish, is just another name for serval different clownfish. They are called this because they live in an anemone in the wild. There a lot of different kinds of and names for the clown fish. There are the Percula, Ocellaris or "False Percula Clownfish", Maroon, Gold stripe Maroon, Tomato, Black & White Ocellaris, and there are a lot more that will be named later.
The cool thing is each one has its own attitude. If you like a sassy larger clown the Gold Stripe will be the one for you. If you like a nicer one then maybe the Tomato. The more pouplar ones are the Percula. I can not pick just one.
They all can live in a home tank fairly easy and they dont have to have an anemone to be happy and healthy. It will just adopt one of the soft corals in your tank to host. Or the Clown fish, will pick a nice rock or cave to make it its home. If you have a mated pair they can also breed in your home tank. you will just have to get the babies out when they are born or they may get eaten by other fish.

It is funny you know that you can have bad days but can fish. I beleive they can. I can go to my tank on some days and everything is cool and the next they are act like they have roids rage. They get so bad that you dont want to put your hand in the tank. My little Maroon Clownfish is the worlds worst. The little Ocellaris is really cool never having the bad swings. So maybe it is just that the other just had PMS.