COLLETTE ET AL.: SCOMBROIDEl 



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Table 160. Developmental Features for the Scombroid Families and Morone. a Primitive Perctform Fish. 



• Data from Fntzsche and Johnson (1980) 



mation (Arata, 1954; Yabe et al., 1959; Potthoff and Kelley, 

 1982), and the scales are supposedly lost in adults (Palko et al., 

 1981). One of us (Potthoff) has found that scales are retained 

 in adult swordfish, at least on some parts of the body. Larval 

 and juvenile swordfish differ from istiophoinds in a number of 

 characters (Table 157). 



Adult Xiphias have two dorsal and two anal fins but larvae 

 and juveniles have single continuous dorsal and anal fins (Yabe 

 et al., 1959: fig. 9). During development, the fin rays in the 

 center of the fins stop growing and the rays become subcuta- 

 neous. The subcutaneous rays and their pterygiophores are pres- 

 ent in the adults (Potthoff and Kelley, 1982). In three scombrid 



