Protodermis Canals were canals of liquid Protodermis located in Ga-Metru. They ran all over the Ga-Metru and were considered very beautiful. Nokama and Matau almost drowned in one in the search for the great disks. 

After the destruction of the Great Spirit Robot, the Protodermis Canals were either destroyed or the Protodermis inside them drained out. 

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