Fig. 5. Medial section through the alcohol-preserved ventricle of a chinook salmon Oncorhynchus tshawytscha (10 kg). Note location of, and the proportion of, ventricle occupied by the compact (C) and spongy (S) myocardium. Arrows indicate coronary arteries. Original magnification, x5. Reprinted with permission from the American Journal of Physiology (Gamperl et al., 1998).