Tralfamadraci

Tralfamadracs are a sapient species.

Biology
Tralfamadracs are light-green in color, have giant heads with lumps, and wear silver suits. They have pointed chins and big eyes. They don't breath any gases because they have a closed system of breathing. The male alien was shown to have a small light on his right hand finger. When this light shines, everyone who saw it forgets about the aliens.

Culture and society
Tralfamadracs don't have money or any kind of currency, and haven't had it for thousands of years. They are a peaceful race. Two of the aliens accidentally came to Earth because their ship was damaged. According to their customs, it is forbidden to attend births and they are secret. When females give birth they sing a Song of Love.