PENAEUS (PRAWN)​ ​​

CLASSIFICATION OF PENAEUS (PRAWN)​

KINGDOM :- ANIMALIA (Multicellular eukaryotic organisms)

PHYLUM :- ARTHROPODA (Jointed appendages.)

SUB-PHYLUM:- CRUSTACEA (Exoskeleton thick, antennae 2 pairs, jaws 3 pairs.)

CLASS :- MALACOSTRACA (6 abdominal segments having body distinctly segmented.)

ORDER :- DECAPODA (Carapace present.)

FAMILY :- PENAEIDAE (Abdomen well developed and hard.)

GENUS :- Penaeus  (Prawn)

GEOGRAPHICAL DISTRIBUTION

  • It is found in American water. Most species are only found in a region between 40° north and 40° south. Some species may occur at higher latitudes.

HABIT AND HABITAT

  • Penaeus is a marine and deep sea form, chiefly inhabiting tropics.

PENAEUS (PRAWN)​ ​​

GENERAL CHARACTERSTICS OF PENAEUS (PRAWN)

  • It is commonly called as prawn.
  • The preserved specimen is orange-pink in colour having thin integument.
  • Body is divided into an anterior rigid cephalothorax, posterior flexible abdomen and a post segmental terminal telson. All these divisions contain appendages. 
  • Cephalothorax is formed of 6 cephalic and 8 thoracic segments. Head contains 2 prominent eyes, very long antennae and short antennules. 
  • Endopodite of the first maxillula is elongated and segmented.
  • Walking legs are attached to thorax and first three pairs of legs are chelate. Each leg bears the exopodite and endopodite. 
  • Abdomen consists of 6 segments and contains swimmerets of biramous swimming pleopods. They lack finger-like processes called appendix intemae on their exopodites. Abdomen is laterally compressed but not bent sharply. Pleopods are biramous and devoid of appendix intemae. 
  • Pleura of the second abdominal segment do not overlap those of the first. 
  • Development includes nauplius, protozoaea and zoaea stages.
PENAEUS (PRAWN)​ ​​

IDENTIFICATION

  • The animal contains cephalothorax, and leaf like uropods, flexed abdomen and all above features, hence it is Penaeus

PENAEUS (PRAWN)​ ​​
PENAEUS (PRAWN)​ ​​
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