Figure 1

Multifocal ulcerations throughout the esophageal mucosa of a 24-year old male California sea lion ( Zalophus californianus ). On gross necropsy evaluation, this sea lion had numerous erosive and ulcerative lesions in the distal half to third of the esophagus. At the esophageal-stomach junction there were large (approximately 1 by 2 cm) erosions. The mucosal lining of the stomach had multiple ulcerative lesions that varied in color from pink to black