Dictionary of Ichthyology  

Sacred Cod of Massachusetts = a codfish carved from pine that hangs in the House of Representatives chamber of the Massachusetts State House in Boston. It is symbolic of the importance of the historical fishing industry to the state. See also cod-napping and Holy Mackerel.

Wikimedia Commons: http://en.wikipedia.org/wiki/File:The_Sacred_Cod_of_Massachusetts.jpg

Canadian Museum of Nature