Saiyans:

Saiyans are aliens from the planet Vegeta Who have tails and the ability to turn into giant apes under the full moon. They have the ability to turn super saiyan. Goku, Gohan, Vegeta, Nappa, Radditz, Goten and Trunks are the only saiyans left after Frieza destroys Vegeta . Goku and Vegeta are the only full blooded saiyans left after Dbz ends.

Saiyans are able to assend to levels called Super Saiyan there are 4 levels and Ill describe each

This is a picture of Goku in Super saiyan 1. To achieve this level an extreme amount of rage is needed and also strength. This form increses power and speed. Signs are the green eyes and yellow hair standing on end.

This is a picture of Gohan in Super Saiyan 2 he was the first to reach this level. The signs are increased strength and speed and the hair grows a little more.

This is a picture of Goku in Super Saiyan 3 he was the first to reach this form. The signs are massive increase in strength and speed and also the hair grows immensly.

This is a picture of Goku as a Super Saiyan 4 he was also the first to reach this level. Signs are regrowth of tail black hair and the red fur on the torso.

Besides the super saiyan levels the are two Oozaru levels Normal and Golden.