 The long and wide pectoral fins have pointed tips and nearly straight margins . The first dorsal fin originates roughly over the rear of the pectoral fin bases ; it is fairly tall and falcate ( sickle @-@ shaped ) , with a blunt apex and a long free rear tip . The second dorsal fin is relatively large with a short free rear tip , and is positioned slightly ahead of the anal fin . A high midline ridge is present between the dorsal fins . The caudal peduncle has a crescent @-@ shaped notch at the origin of the upper caudal fin margin . The caudal fin has a large lower lobe and a strong ventral notch near the tip of the upper lobe . The dermal denticles are closely spaced but non @-@ overlapping , such as that the skin shows between them ; each is oval with three horizontal ridges leading to marginal teeth . The coloration is gray to bronze above , with a faint pale stripe on the flank , and white below ; sometimes there is a green sheen along the gills . The tips of the fins ( except for the pelvic fins ) are darker ; this is most obvious in young sharks . Males and females grow to at least 2 @.@ 7 m ( 8 @.@ 9 ft ) and 2 @.@ 8 m ( 9 @.@ 2 ft ) long respectively ; this species possibly reaches 3 m ( 9 @.@ 8 ft ) in length . The maximum weight on record is 168 kg ( 370 lb ) . 
