271 Part I[I.—Twenty-fifth. Annual Report. 
When under the influence of this abnormal craving the fish sometimes 
approach the surface of the water even during the middle of the day, and 
have been observed by fishermen greedily feeding on znsects (probably 
Copepoda) and young fishes, and this is confirmed by the fact that several 
of the herrings I examined at Tarbert at the time referred to had their 
stomachs filled with young herring or sprats about an inch and a half in 
length. This ravenous desire for food has been ascribed to some disease 
in the fish, but Mr Brook was inclined to doubt this. Herrings which’ 
are finest in quality have usually their stomach and intestines almost 
empty and their internal organs covered with white healthy fat, 
