Figure 2-7. Shrimp tails, grooved and not grooved.
(2) Pink grooved shrimp. The shell is a light pinkish brown to a very light
reddish brown. On the third tail segment from the head, there is a small pink spot
approximately 1/4 inch in diameter. There is a groove on each side of the dorsal ridge
of the last tail segment. The scientific name is Penaeus duorarum. See Figure 2-8.
(3) Brown grooved shrimp. The shell is a light reddish brown, almost the
same as pink. They are grooved but minus the pink spot on the third segment. The
scientific name is Penaeus aztecus. See Figure 2-9.
Figure 2-8. Pink grooved
Figure 2-9. Brown grooved
2-9. ANATOMICAL FEATURES OF LOBSTERS
Lobsters are by far the most expensive shellfish item purchased by the military
services. Those found within the supply system are the "true Maine lobster" and the
"spiny lobster." The anatomy and functions of the lobster are the same as the shrimp
except that lobsters have claws on their first walking legs.