160 American Fisheries Society 



ered sometimes to be poisonous, but in Porto Rico nothing 

 detrimental was heard about the species. 



The fresh-water fish fauna of Porto Rico is very scant 

 even considering the limited fresh waters of the island, 

 and it may be advantageous to introduce game or food 

 species as the demand for fish exceeds the supply and 

 much salt-cod is marketed. At Guanica a large shallow 

 lake, with edges plentifully grown with water plant and 

 containing Top Minnows, Poecilia, in abundance, has the 

 disadvantage that its waters at times doubtless reach a 

 high temperature. Near Guayama sizable lakes have re- 

 cently been made for irrigation purposes by damming 

 back the stream. One of these lakes visited seemed 

 notably barren of plant and animal life and probably 

 some food would have to be introduced before larger 

 fishes would thrive. 



It is interesting that at one point on the island, Isabella, 

 the common aquarium goldfish is found. From there 

 some specimens have been brought to a small pond on the 

 Governor's place in the hills above Guayama where they 

 are doing well and breeding. The goldfish is primarily a 

 cold-water fish and its introduction in the tropics is in- 

 teresting. 



