nSHERY BULLETIN: VOL. 79, NO 2 



Table 7. — Development of spines in the head region of Sebastes zacentrus larvae and juveniles. Specimens 



inferior infraorbital spine appears as a blunt 

 bump at ~8 mm and as a sharp spine in larger 

 specimens. The first superior infraorbital spine is 

 present as a sharp spine on all specimens <23 mm, 

 as either a sharp spine or a blunt bump between 23 

 and 35 mm, and was absent in the benthic 

 juveniles examined (65.0-74.8 mm). The second 

 superior infraorbital spine is occasionally present 

 between 15 and 30 mm. The third superior in- 

 fraorbital spine is usually present as a sharp spine 

 in larvae and pelagic juveniles 14 to 35 mm. Small- 

 er larvae and benthic juveniles examined lacked 



this spine. The fourth superior infraorbital spine 

 usually appears as a blunt bump in larvae 8-10 

 mm long and as a sharp spine in all larvae and 

 pelagic juveniles >10 mm. This spine was absent 

 in benthic juveniles. The nasal spine appears as a 

 blunt bump in larvae =10-11 mm long and as a 

 sharp spine in all larger specimens. 



The tympanic spine appears as a blunt bump 

 between 17 and 18 mm and as a sharp spine in all 

 larger specimens. The pterotic spine is reduced to 

 a blunt bump by 30 mm and is absent on benthic 

 juveniles. The inferior posttemporal spine is pres- 



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