COUCH; DISEASES AND PARASITES OF PENAEID SHRIMPS 



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Figure 30. — Metacercaria oWpecoeloides fimbriatus, digenetic trematode, from hepatopancreas or hemocoel of 

 adult pink shrimp. This species is quickly identified by its large, pedunculate acetabulum (arrow). x70. 



FIGURE 31. — Section of plerocercoid larva of Prochristianella hispida encysted in hepatopancreas of pink 

 shrimp; note cyst wall and lack of host cellular response (Feulgen picro-methyl blue stain). x50. 



Figure 32. — a. Fresh wet mount of plerocercus of P. hispida; note scolex and blastocyst. x50. b. Scolex ofP. 

 hispida; note tentacles (T) and bothria (B) (au-rows). x50. 



Figure 33. — a. Larvae of an unidentified cestode commonly found in hemocoel of penaeid shrimps; this figure 

 shows a mass of larvae against the midgut lining (dark line). x25. b. Unidentified cestode larvae showing 

 calcareous corpuscles and large sucker (arrows). x25. 



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