Aggression
Some scholars believe that behaviors like aggression may be partially learned by watching and imitating people's behavior, while other researchers have concluded that the media may have some small effects on aggression. There is also research questioning this view. For instance, a long-term outcome study of youth found no long-term relationship between playing violent video games and youth violence or bullying. One study suggested there is a smaller effect of violent video games on aggression than has been found with television violence on aggression. This effect is positively associated with type of game violence and negatively associated to time spent playing the games. The author concluded that insufficient evidence exists to link video game violence with aggression. However, another study suggested links to aggressive behavior.
Fish aggression
Aggression refers to negative behavior or attitudes toward another, mainly by applying physical force. Evolution on the other hand, is any process of formation or development of something like habit, trait or character in a population from generation to generation. Evolution can explain why fish exhibit aggression because it is a simple emotion. This emotion increases an individual’s survival or reproduction. Aggressive behavior can derive in fish species due to territory, sex specific selection and genetic variation. There is no specific fish species who display invasive behavior. Almost all the fish are aggressive sometimes in their lives depending on their surroundings.