22 Commercial Shark Fishing in the Caribbean Area 



Tiger Shark, Galeocerdo cuvier, Figure 42. 

 Lower and upper teeth shaped as in Figure 

 42. Labial furrow on upper jaw is about 

 as long as the snout in front of mouth. 

 There is a spiracle. 



Great Blue Shark, Prionace glauca, 

 Figure 43. 



Lower teeth very obviously not shaped like 

 those of the Tiger Shark shown in Figure 

 42. Labial furrow on upper jaw, if pres- 

 ent, much shorter than snout in front of 

 mouth. 

 No spiracles. 



Mid-point of base of first dorsal is much 

 nearer to the origin of pelvics than to axil 

 (armpit) of pectorals. 



j. Teeth — With 3 or 4 sharp cusps (or points) 

 in several functioning series. 



Pigmy Dog Fish, Triakis barbouri, 

 Figure 44. 



k. Teeth — Edges of primary cusps of. upper 

 teeth perfectly smooth. 



Smooth-Toothed Shark, Aprionodon iso- 



don, Figure 45. 



Second dorsal and anal fins obviously much 



smaller than first dorsal. 



First gill opening more than 3/4 as long as 



distance between inner edges of nostrils 



and the snout in front of mouth. 



Upper and lower teeth erect, symmetrical, 



slender, their edges not notched. 



Sharp - Nosed Shark, Scoliodon terrae- 



novae, Figure 46. 



First gill opening less than 1/2 as long as 



distance between inner edges of nostrils 



and not more than 1/4 as long as snout in 



front of mouth. 



Upper and lower teeth more or less oblique, 



their outer edges deeply notched. 



