Living environment: river shrimp for freshwater shrimp, living in rivers, lakes, ponds, while the periphyton shrimp for the near-shore shallow sea shrimp. Inhabited in the muddy sandy bottom waters.
Individual size: river shrimp body length of about 3-8cm, the periphyton shrimp body length of about 10-15.5cm.
Appearance: river shrimp frontal sword upper and lower margins have teeth, while the periphyton shrimp only frontal sword teeth on the upper edge of the lower edge of the toothless.
I, nature classification
1, river shrimp (Japanese shrimp, shrimp) for the phylum Arthropoda, Crustacea, Decapoda, Brachyuridae, shrimp genus.
2, the basal shrimp (knife forehead new shrimp) for the phylum Arthropoda, Crustacea, Decapoda, Prawnidae, new shrimp genus.
Two, living environment
1, river shrimp for freshwater shrimp, mainly distributed in rivers, lakes, ponds, reservoirs, ditches and other places.
2, the basal shrimp belongs to the near-shore shallow sea shrimp, mainly inhabiting the sandy or muddy bottom waters.
Three, individual size
1, the river shrimp adult shrimp body length of about 3-8cm.
2, the adult shrimp Keeled shrimp body length of about 10-15.5cm, the smallest about 8cm.
Four, physical characteristics
1, river shrimp, frontal sword on the upper edge of the 12-15 teeth, the lower edge of the 2-4 teeth, while the Keeled shrimp frontal sword upper edge of the teeth (about 6-9 teeth), and the frontal sword of only the upper edge of the teeth (about 6-9 teeth). teeth (about 6-9 teeth), the lower edge is toothless and smooth.
2, the river shrimp's second step foot is strong and powerful, especially the male river shrimp, its second step foot length is about 1.5-2 times the body length.
3, the river shrimp body color is greenish gray, while the basal shrimp body color is earthy yellow to tan, swimming feet are brown or russet.