Kriken

The Kriken are a race of imperialistic creatures. The Kriken control the Kriken Empire.

Rite of Passage
When a Kriken becomes a certain age, they must venture out on a rite of passage to find a planet the Krikens can invade.

Alimbic Message
When the Krikens recieved the message from the Alimbic Galaxy, that "The secret to ultimate power resides in the Alimbic Cluster," the Alimbics sent Trace, a youth undergoing his rite of passage ritual, to find the "secret to ultimate power." (Metroid Prime: Hunters)