ATLANTIC SAILFISH 



147 



SAILFISH LARVA. 20.9 MILLIMETERS 



(Fig. 12) 



All rays in tlie dorsal and anal fins extend (for 

 the first time) to fin margins, and the dorsal fin 

 groove extends the entire length of the dorsal fin 

 (previously approximately two-thirds tlie length 

 of the fin). 



SAILFISH LARVA, 27.4 MILLIMETERS 



(Fig. 13) 



The snout is three-fifths tlie head length. 

 Fangs liave disappeared from the snout tip. The 

 eye diameter is approximately one-sixth the head 

 length (previously one-fifth). A small pore is 

 discernible on each side of the snout just anterior 

 to the nostril. The dorsal fin has increased in 

 height, and the anal fin is indented in central 

 portion. 



SAILFISH LARVA, 38.8 MILLIMETERS 



(Fig. 14) 



The snout extends for one-half its length beyond 

 the tip of the mandible. Teetii are fewer in 

 number in the part of the upper jaw extending 

 beyond tip of mandible. Two pores are present 

 on each side of the snout, one anterior to and one 

 below each nostril. The dorsal fin is higher and 

 more uneven in outline, and an anal fin groove has 

 appeared (formed by a dermal flap on each side of 

 fin). The lateral line is discernible for the first 

 time. The pigmentation has developed into 

 distinct patterns on the body and the dorsal fin. 



SAILFISH LARVA, 56.2 MILLIMETERS 



(Fig. 15) 



The snout is markedly produced (three-quarters 

 the head length) and extends for approximately 



Figure 11. — Sailfish larva, 18.2 millimeters long. From Theodore N. Gill collections. 



Figure 12. — Sailfish larva, 20.9 millimeters long. From Theodore N. Gill collections. 



