Figure 5.1- 5.8. 5.1. Alosa sapidissima (American Shad), lower flank; scale bar = 1.0 mm. 5.2. Alosa sapidissima (American Shad), lower flank; scale bar = 1.0 mm.  5.3. Alosa sapidissima (American Shad) lower flank. Magnified area from 5.2 showing circuli detail and the contact (join) between the posterior and anterior fields; scale bar = 500 µm. 5.4. Alosa sapidissima (American Shad), pectoral; scale bar = 1.0 mm. 5.5. Alosa sapidissima (American Shad), pelvic; scale bar = 1.0 mm. 5.6. Alosa sapidissima (American Shad), pelvic; scale bar = 1.0 mm. 5.7. Alosa sapidissima (American Shad); scale bar = 1.0 mm. 5.8. Alosa sapidissima (American Shad); sketch of living specimen; length = 76 cm. (To see enlargement, click on image.)