338 FISH HATCHERY MANAGEMENT 



12. BOl)\ SURFAC.K— Continued: 



/Pinpoinl pimples I I Cysts I I /Pinpoint spots: white I I or black I I 



/Paiasiics: verv small, bareh' visible, soil I I oi Ifjnger, hard I I (often with suallowiail 



appearance) 

 /Fish abnormally dark: entire bod% I I certain body areas I I Indicate where 



Growth LJ oi Warts I I Iriegiilai I I proliferating I I on surface I I 



protruding from: vent I I nostrils I I 



mouth LJ gills LJ 



color: fish bod\ D red D black D 



13. FINS— Na D 



Normal I I Swollen I I Necrotic I I Frayed I I 



Bluish-white I I Twisted I I Eioded I I 



/Spots present: white LJ black LJ /Blood-shot I — I Parasite present I — I 



14. CAUD.AL PKDL'NCLE— Na D 



Slightly Swollen D Bluish-White D Necrotic D 

 Very Swollen I I Fungus-like tufts present I I Inflamed I I 



15. CILI.S— Na n 



Covers open more I I Swollen I I Covered with mucus, I — I 



than normallv food and dirt particles 



Patches: white I I brown I I gray I I 



(IF EXAMINED UNDER MICROSCOPE) 



Filaments and Lamellae: Swollen LJ fused I I club-shaped I — I 



ballooned I I Cottonv tufts present I I 



Small gravish-white objects: on filaments I — I on lamellae I — I 



between filaments I I between lamellae I I 



Color of gills: deep red LJ pale red I — I 



hemorrhagic I I pale pink I — I 



16. MUSCULATURE— Na D 



Sores I I or Fmuncles I I filled with red pus I I Small red spots I I 



i sores I I 



or filled with creamy I I or cheesy I I contents 



cysts I I 



Hard cysts like sand grains: small I I black I I 



large I I or \ellow I I 



Figure 106. Continued. 



