120 FISH CULTURE. 



which remain behind, as many do, bury themselves 

 in the mud or seek some hole in which to hybernate. 

 It has been questioned whether the eels that so mi- 

 grate do so for the purpose of spawning in the brackish 

 water. I think it cannot be questioned that they do 

 spawn there, else whence those countless myriads 

 of small eels, which, under the name of "eel-fare," 

 migrate from the brackish water up to the fresh in 

 many of our large rivers ? I have seen them in the 

 Erne, in Ireland, pushing their way up even from the 

 sea in countless millions, early in the month of May. 

 I think there can be no doubt that they spawn as 

 well in the brackish as the fresh water, but that if 

 they have the choice they prefer the warmer or 

 brackish water. Of late years, in the Thames, they 

 have not had this choice, owin^ to the filthv water 

 about London, in which it has been proved that eels 

 cannot exist. The consequence has been the dis- 

 continuance of " eel-fare," once a very striking and 

 remarkable sight, on the Thames. The eels have, it 

 would seem, from this circumstance, greatly dimi- 

 nished in numbers ; and whether it be that the fresh- 

 water spawning is not so favourable to their increase 

 as the brackish, or whether large numbers of eels still 

 migrate and die in the foul water, or that, getting 

 down with a flood to aid them, they do spawn and 



