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Genus Palaemon

Grass shrimp? - Palaemon Palaemonid Shrimp  - Palaemon elegans Grass Shrimp - Palaemon vulgaris Palaemon pugio Shore Shrimp - Palaemon pugio Palaemon intermedius - female Rockpool Shrimp - Palaemon elegans Rockpool Shrimp - Palaemon elegans
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Crustacea (Crustaceans)
Class Malacostraca (Malacostracans)
Superorder Eucarida (Eucarida (Crabs, Crayfish, Shrimp, etc.))
Order Decapoda (Crabs, Crayfishes, Lobsters, Prawns, and Shrimp)
Infraorder Caridea (Caridean shrimps)
Family Palaemonidae
Genus Palaemon
3 native species in southern New England(1); 92 species worldwide listed in WoRMS.
A good view of the rostrum is needed for a species ID.
Worldwide, marine, brackish, fresh.
Internet References
Works Cited
1.Keys to Marine Invertebrates of the Woods Hole Region
Smith R.I. 1964. Woods Hole Oceanographic Institute.