[PaulF]

I would be fearful of attracting skunks and raccoons and maybe rats to the compost pile. Composting along with other organics like vegetable matter probably be quite a compost pile. Maybe a little stinky though. From what I understand it is best to put the fish parts into the core of a compost pile that is already up to temperature and that will eliminate most of the odor and the pest attraction.

All told, fish compost is a good source of nitrogen if composted correctly. Undercooked fish will release a lot of ammonia into the pile, so be sure your pile is plenty hot.