Krana

A Krana is an organic creature with a link to the Bahrag queens. They primaraly control the Bohrok, but when attached to a Toa, Turaga or a Matoran, they become a member of the Bohrok Swarm also.

Creation
It is unknown how the Krana are created.

Breeds
There are 8 types of Krana in 6 colors. Each one of the 8 types are in a different shape, and perform a different function. The colors depend on the Bohrok. For example, Blue Krana are found in Tahnoks.

Metru-Nui
Bohrok do reside on Metru-Nui, and like the ones on the island of Mata-Nui, they are equiped with Krana.