200 pounds is a juvinial ive done research and have found out males get up to 13 feet and females can get up to 18 feet in length they come in to the puget sound to breed and thats it but the younger six gills will stay in the waters till adults and will stay with their siblings as in brothers and sisters untill they mature which is a little over 6 feet in length i have caught and release a six gill pushing 12 feet but as they are protected i could not take it out of the water for a correct measurment...........

What i think took a bite out of your cod was most likely a small salmon shark as a dogfish's jaw is quite dull but i have seen dogfish around the 5 foot range and over 20 pounds at point defiance