cartilaginous, saltwater, coastal-pelagic
Sandbar Shark
Carcharhinus plumbeus
Heavy-set body with a very high, triangular first dorsal fin originating over the pectoral fin axis. It lacks a dorsal ridge. Coloration is typically bluish to brownish-gray on top with a white underside. The snout is short and rounded.
- Habitat
- Found globally in temperate and tropical coastal waters.…
- Size & weight
- Adults typically reach 6 to 8 feet (1.8 to 2.4 meters).…
- Diet
- Primarily an opportunistic feeder consuming small bony f…
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Physical characteristics
Heavy-set body with a very high, triangular first dorsal fin originating over the pectoral fin axis. It lacks a dorsal ridge. Coloration is typically bluish to brownish-gray on top with a white underside. The snout is short and rounded.
Habitat & distribution
Found globally in temperate and tropical coastal waters. They prefer muddy or sandy bottoms in shallow coastal waters like bays, estuaries, and harbors, but also venture into deeper water on the continental shelf.
Behavior
Migratory species that moves north in the summer and south in the winter. They are generally solitary but may congregate in nursery areas or during migrations. They are most active at night.
Diet
Primarily an opportunistic feeder consuming small bony fishes, smaller sharks, rays, octopuses, and crustaceans like crabs and shrimp.
Reproduction
Viviparous (live-bearing) with a yolk-sac placenta. Females give birth to 1 to 14 pups after a gestation period of 8 to 12 months. Nursery areas are usually shallow coastal bays.
Ecological role
Acts as an apex or high-level predator that helps regulate populations of smaller fish and rays, maintaining the health and balance of coastal marine ecosystems.
Similar species
Bull Shark (Carcharhinus leucas) which has a smaller dorsal fin and broader snout; Dusky Shark (Carcharhinus obscurus) which has a lower dorsal fin positioned further back.
Identification tips
Look for the exceptionally large, high, and triangular first dorsal fin which is the most prominent feature. The lack of an interdorsal ridge also distinguishes it from several similar Carcharhinus species.
Interesting facts
The Sandbar Shark is one of the most common large sharks in the Atlantic. Unlike many other predatory sharks, it is not known to be aggressive toward humans unless provoked.