Matsya - Fish
Ketu relates to the fish incarnation of Vishnu. This is the fish that save Manu who is the original man Adam and Noah to the bible which brings a new cycle on earth.
Ketu is the destruction that is prior to the grounds to a new creation.
Honouring Matsya grants us a new creative surge that allows us to find a fresh and higher karma to move our lives forward to the divine, transforming and uplifting our Ketu past life energy.