Dictionary of Ichthyology  

sea bishop = a monstrous figure reported in the sixteenth century, scaled like a fish and resembling a bishop, presumably founded on the Jenny Haniver and Ea, the Sumerian fish god figure (q.v.). Also called bishop-fish.
From Guillaume Rondelet's Libri di Piscibus Marinis (1554).

           Canadian Museum of Nature
         www.briancoad.com