Manga.

What is a manga?
A manga is a comic, a Japanese comic. It is different from American comics because of these points:

Style.
Narrative.

Manga has an easily identifiable style since characters are frequently thin, with big eyes and a striking appearence, for both male and female character.
American comic style tends to draw male characters in a more muscular manner, and way more attractive for women; It is more realist in the art, doesn't use exxagerated expressions like in mangas.

Narrative in mangas has a beginning, outcome and ending, it is read from right to left.
In american comics exists parallel universes that gives continuity to the history for a long time, and from time to time those universes cross each other. They are read from right to left.
Mangas are printed in black and white, and comics in color.

There are various genres in manga, for example:
Shonen: For boys. Topics are about fights and superpowers, it is his main point.
Shojo: For girls. Is a softer genre with the plot mostly being romance.
Gore: Is a genre where there is a lot of blood.
Seinen: For older boys.
Josei: For older girls.
Yaoi: Romance between men.
Yuri: Romance between women.
Ecchi: A genre with a big ammount of erotism mixed with comedy.

Manga artists are known as mangakas. Next i will leave some images from various mangakas