betta fish.
Flickr/TheEye - LN Name: Betta Fish (aka Siamese Fighting Fish) Personality: As their alias suggests, Bettas don't always do well with other fish; there are certain fish with whom they cannot get along, according to Aquarium Hobbyist. Male bettas, in particular, can be quite territorial towards other male bettas and other fish, specifically fish with lots of blue and red, fish with long flowing fins, or fish with similar shapes. Care: Aside from feeding your betta fish daily (or close to it, as they can go a day or two without food) and keeping their tank clean, there's not much involved in caring for them. While some people keep bettas in small vases, the best environment for this fish ...