Gross signs of yellow-head infection are seen here in the 3
shrimp on the right. They are generally bleached in color with a
yellowish discoloration of the cephalothorax (“head”) region when
compared to shrimp of normal appearance on the left (Chantanachookin
et al., 1993). (For interpretation of the references to color in this
figure legend, the reader is referred to the web version of this article.)