External Descriptive Characters

1. Colour of Body : Greyish greenish

2. Decoration : Tiger like stripes on the body

3. Dosy shape : straight

4. Rostral shape : straight

5. Rostral Size : Medium

6. Rostal formula : D/V -8/3

7. Carapace :
   a)Size of Carpace : Moderate
b) spines of carpace :

   Hepatic spine -present
Antennal spine -presnt
Post orbital spine -absent
Branchiostegal spine -Absent
Supra hepatic spine -Absent

   c) Carina of Carapace :
Hepatic Carina: Present
Adrostral Carina : present
Post rostral carina : Present
Longitudinal Carina : Present
Branchiocardial Carina : present

   d) Slcus of Carapace :
Hapatic sulcus : present
Adrostral sulcus - present
Post rostral sulcus - presnt
Longitudinal sulcus - present
Branchiocardiac sulcus - Present

8. Eye Condition : Stalked and Compound
Antennules :
a) number of antennular Flagella : two
b) Size of antennular Flagella : Large

9. Condition of abdomen : Straight

10. Abdominal Pleura : Generally previous absominal pleura joverloped all abdominal pleura

11. Abdominal Carina : Present

12. uropods :
    a) Size : Medium
b) Conditiion : Smooth

13. Telson :
    a)Condition : Non-spiny
b) Size : Medium
c) Groove on dorsal surtface : Absent
d) Spine : Absent

14. External genital organ : Petasma present , so it is male .

Morphometeric Characteristics

a. Total Length : 23cm
b. Stander Length : 7.8cm
c. Carapace Lenght : 3.2cm
d. Rostral Length : 3.9 cm

Specific Characters Grouped in to differnt taxa

a. Join Footed Animal Hence the specimen Belongs to the phylum:Arthropoda
b. 5segment of head fused so the specimen belongs to the class : Crustacea
c. Ten walking legs so the specimen belongs to order : Dcapoda
d. Last two pairs walking legs developed so the specimen belongs to the Family : penieae
e. Teeth on upper side only hence the specimnt belongs to the Genus : Penaeus
f. Rsotral formula p/v 8/0 So the specimen belong to Species: P. monodon

Conclusion

on the basis of external characters monophometric characters meristric characters and finally specific characters grouped into different taxa the speciment is Penaeus monodon(Febricius, 1798)

References :

Carpentur K.E and Neim V.H,1998 "The living marine resources of the western contral pacific food and agriculture organiztion of the united nations rome" Vol-2

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