Palaemonetes sp. (Grass shrimp) early zoea
Zoeal stage I
Collected: Caught using an epibenthic sled (365 micrometer mesh) 1-2 km offshore from Chincoteague, VA. Depths of 7-9 meter, April, 2006
Notes: At least 3 common grass shrimps in the genus Palaemonetes occur along the Atlantic Coast and in Atlantic estuaies.
Early larvae have a straight rostrum as shown above. Later larvae have a longer rostrum with increasing numbers of dorsal teeth as development advances.
Above: a late grass shrimp zoea. Note the two large dorsal teeth on the base of the upcurved rostrum.
The telson also undergoes extensive changes in later stages.
Telson of Palaemonetes zoeal stage one. Compare with the mud shrimp Upogebia
Collected by: William S. Johnson, Goucher College