In fish of a body length of about 2 60 inm„ almost no 

 differences in form from specimens of around 140 mmo can be 

 perceivedo The dorsal and anal fins are still single-based, 

 but the rays which are to form the anterior portions of the 

 second dorsal and the second anal are developicg and those which 

 are to make up the posterior extremities of the first dorsal 

 and the first anal are becoming shorter so that the tendency 

 toward the separation of each set of fins into two bases is 

 becoming clearo 



When it comes to larger specimens, I have seen one of 

 about 700 mmo body length taken in a coastal gillnet in the 

 Annam area, but I had no opportunity to make a thorough 

 examination of ito 



Fish of around 140 - 2 60 mm„ body length have a marked 

 positive phototropism and they are frequently collected with 

 fishing lights o 



I have no data at all as yet on the spawning habits of 

 Kajikia f o rmo s ana n 



The spawning of Kajikia mitsukurii in Formosan waters 

 seems to be at its peak from April to May, and in the fish taken 

 at that season the gonads are generally well developed, ripe 

 ova being seen frequent ly„ At this season in Formosan waters 

 this species is comparatively scarce in the Pacific coast 

 waters and more abundant in the South China Sea. Consequently 

 it is thought that spawning is carried on mainly in the South 

 China Sea, In form the ripe ova are almost the same as those 

 of the sailfishp and it is impossible to distinguish them 

 merely by seeing the eggSo No data have been obtained as yet 

 concerning the larval and juvenile formso It is known that 

 this species also spawns near the Ogasawara Iso in the Central 

 Pacific around May -June o 



The spawning of the black marlin occurs from April to 

 August in the waters east of Luzon and Formosa, and eggs from 

 ripe ovaries have been collected. There is not as yet, however, 

 any material on the larval and juvenile stages. The form of 

 the ripe ova is just like that of the sailfish and Ko mitsukurii. 



No concrete data have yet been obtained regarding the 

 spawning habits of the white marlin^ but for reasons given 

 below it is presumed that their spawning season in Formosan 

 waters is probably around August - Octobero 



The number of eggs in the ovaries of one spearfish varies 

 depending on the species and the size of the individual, however, 

 it appears to amount to from 1 million to l,200,000o This 

 figure is obtained from the total weight of the ovaries and the 

 number of eggs contained in 1 gram, and is thus an extremely 



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