Dusky Shark: Carcharhinus obscurus


  • Back is bronze-gray to blue-gray, fading to a white belly
  • Snout moderately rounded, shorter than or equal to mouth width
  • Second dorsal fin free tip less than twice as long as fin height
  • First dorsal fin starts over the pectoral fin free tip
  • Interdorsal ridge present

Similar Species: Sandbar shark, C. plumbeus (first dorsal fin starts in front of pectoral fin insertion); silky shark, C. falciformis (first dorsal fin starts behind pectoral fin free tip; longer second dorsal fin free tip)

Size: Up to 12 feet 


Nearshore and offshore waters; avoid estuaries with low salinities 


May live up to 40 years; feed on other sharks, fishes and squid

Additional Information

Recreational Regulations

Image Credit: © Diane Rome Peebles

FWC Facts:
Biologists estimate 10,000-14,000 sturgeon live in the Suwannee River. Adult populations in other Gulf Coast rivers range from a few hundred to about 2,000.

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