Figure 19.1 - 19.9. 19.1. Thaleichthys pacificus (Eulachon); body region A; scale bar = 500 µm. 19.2. Thaleichthys pacificus (Eulachon); body region C; scale bar = 500 µm. 19.3. Thaleichthys pacificus (Eulachon); body region E; scale bar = 500 µm. 19.4. Thaleichthys pacificus (Eulachon); body region I; scale bar = 1.0 mm. 19.5. Thaleichthys pacificus (Eulachon); body region I; scale bar = 1.0 mm. 19.6. Thaleichthys pacificus (Eulachon); scale bar = 1.0 mm. 19.7. Thaleichthys pacificus (Eulachon); scale bar = 500 µm. 19.8. Thaleichthys pacificus (Eulachon); scale bar = 500 µm. 19.9. Thaleichthys pacificus (Eulachon); sketch of living specimen; length = 23 cm. (To see enlargement, click on image.)