Also, what you keep will determine what fish to purchase. For example, I am having to stay away from angels because they will apparently nip at my soft corals.
Also many fish can be difficult to keep or may require a much larger tank size.
There is a book called "Pocket Guide to Marine Fishes" by Scott Michael. I think there is a companion book for invertebrates.
If you want the LOOK of an anemone, you can get that with several different types of corals, including frogspawn and hammer. I just bought a nice frogspawn specimen for this reason.
I would really like to have an anemone. But... they are extremely sensitive and easily killed. When they die they really can foul up a tank. With a 10 gallon tank, that means every living thing in it could be wiped out rather quckly.
Also, anemones move around, just like starfish do. This means they can get into powerheads and/or mess with your polyps. Corals are nicer because they stay put.
I have been told that "Bubble Tip" anemones are easier to keep than most, but at the end of the day, based on the advice I got from a lot of people who know a lot more than I do - and whom I have a great deal of respect for, I decided to NOT try them out.
http://www.vividaquariums.com/10Expand. ... 02-1515-10
In the final decision, you may buy one or more, and you might be able to make them work.