Hawaiian Fishes 



153 



Pacific Thread Fin 



Also known as the Moi or Moi-lii 

 74-1 Polydactylus sexfilis (Valenciennes) 



From Jordan & Evermann 



The body of the Pacific Thread Fin is deep and compressed in shape. 

 It is dark in color above and becomes almost white on the lower surface. 

 It reaches a length of twelve inches. 



This fish is reported to have been called pala-moi on Kauai and 

 mana-moi on Hawaii-. 



It occurs from Mauretius through the Indian Ocean to the East Indies 

 and to the Hawaiian Islands. 



THE MACKEREL OR TUNA FAMILY 



75 Family Scombridae 



The members of the mackerel family may be recognized by the fact 

 that they have slender, tapering, spindle-shaped bodies which end in a 

 very small caudal peduncle, a series of detached finlets on the body behind 

 the dorsal and anal fins, and a metallic color usually of steel blue. In 

 addition, they have a keel on the peduncle, and smooth scales. 



In general, the mackerels are all fish of the high seas, many of which 

 are cosmopolitan and have a wide range. They are surface fishes and 

 because of their strong muscles and stream lines are swift swimmers. The 

 tuna are great wanderers and are continually swimming in search of the 

 fishes which form their food. They feed on mackerel, herring, flying fishes, 

 sardines, squids, and cuttlefish. 



