This is some photos of fish that I have had in the past. I will not go into great detail about them.

 

Some saltwater fish and shrimp I at one time or another had.

 

seahorse saltwater shrimp



And some pictures of a Red Belly Piranha that I owned for about 4 years, till selling him to a friend. I also owned a Red Oscar for a short time. After having the piranha that really rips into his food, I found it really boring to watch an oscar swallow his food whole. My piranha was one of the very few pets that I even named....Thug.
piranha red belly piranha

One other interesting thing I found with this fish. When I would drop a goldfish into his tank, and be the only person in the room, he would eat it right away. If someone else was in the room, he would not eat till they left.
Red Belly Piranhas are shy fish. I made sure that he was well fed before I placed my hand in the tank to clean it. When I would place my hand in the tank he would just go into the corner and hide till I was finished. At first this idea did not seem like a very good one to me, but I cleaned my tank many times while I had my piranha, and can still count to 10 using my fingers.