"So Jagannatha is another feature of Krishna, and He is especially favorable to the people who are not strictly advanced to the Brahminical culture of Vedic rituals. Lord Jagannatha is situated in India, at Puri; this place is one of the towns of Orissa province. And the people of Orissa and Bengal, they are sometimes fish-eaters, why sometimes—about 90% population they are fish-eaters. But Jagannatha Swami in Puri, He accepts service from these people although they are sometimes fish-eaters. So in the Kali yuga, the people are supposed to be not so clean, and therefore, service to Jagannatha Swami is preferred. So far service to Laksmi-Narayana, and Radha Krishna, it requires highly elevated position, transcendental to Brahmins. But still, either we serve Jagannatha or Radha Krishna, the effect is the same. But to facilitate the worship of the Lord in the Form of Jagannatha is more congenial than others. But when anything is offered to Jagannatha, it does not mean that it is not taken by Krishna. So in the temple, although we offer to Jagannatha, it is also accepted by Krishna. Be rest assured of this fact."
Srila Prabhupada 1968 Correspondence : August : Letter to: Dayananda, Nandarani -- Montreal 24 August, 1968