In the second yukam called Chathura Yukam,accoording to Ayyavazhi mythology one of the six Pieces of Kroni was formed as a creature with the name of Kuntomasali with the shape and size of a mammoth leech, and when it disturbed the tavam of those in Thavalokam, Mayon destroyed it by catching it in a hook.
References
Chathura Yukam Wikipedia(Text) CC BY-SA