The gross anatomy of four cultured fishes, having diverse feeding habits are described in this section, emphasizing noteworthy structures which show relationships to feeding and digestion. The line drawings are intended to serve as a general guide for the examination and dissection of actual specimens and are not intended to show definitive details of visceral organs. The four species illustrated were selected primarily for variety of feeding habits and life styles among a dozen or more cultured species with no intent to indicate their importance or representativeness compared to other culture species.