Sandbar Shark

Carcharhinus plumbeus is a medium-to-large requiem shark, typically reaching 1.5 to 2 meters in length, recognizable by its notably tall, triangular first dorsal fin and stocky, grey-brown body. As a slow-growing, late-maturing predator, it feeds on bony fishes, small elasmobranchs, and invertebrates, occupying a mid-to-upper trophic position that helps regulate prey populations on continental shelves and coastal ecosystems. It is generally solitary or found in loose aggregations, with pupping and nursery areas concentrated in shallow coastal waters before individuals move to deeper offshore habitat as adults.

The species has a broad, nearly circumglobal distribution across temperate and tropical seas, occupying rocky reefs, continental shelf waters, and open oceanic environments. It is recorded in coastal and offshore waters of dozens of countries and territories spanning the Atlantic, Indian, and Pacific Oceans, including the United States, Australia, Brazil, Japan, South Africa, and numerous island nations.

Population decline is driven primarily by targeted and incidental capture in commercial and artisanal fisheries, where it is caught for meat, fins, and liver oil; its late maturity and low reproductive rate make populations slow to recover from fishing pressure. Habitat degradation from coastal pollution and runoff associated with land-use changes, including logging, further reduces nursery habitat quality.

Conservation measures include regional fishing quotas and retention limits in some jurisdictions, protections under certain regional fisheries management frameworks, and listing on international trade monitoring agreements. Some nursery habitats fall within marine protected areas.

Despite these measures, enforcement remains inconsistent across its range, and the species continues to face sustained fishing mortality. Current assessments indicate a continuing population decline, with long-term recovery dependent on stronger, more consistently enforced management across multiple national jurisdictions.