Blacknose shark (Carcharhinus acronotus)

Habitat and distribution

Blacknose sharks prefer shallow, nearshore environments where they hunt and shelter. Typical habitats include seagrass meadows and shallow bottoms composed of sandy flats or areas with broken shell or coral rubble. They are usually found in temperate to tropical waters and commonly occupy coastal shelves, estuaries and lagoons where prey is abundant.

Appearance and identification

Adults are relatively small compared with many other members of the shark family, typically reaching just over a metre in length. The common name comes from a dark mark or blotch at the tip of the snout. Overall coloration is gray to brown on the back with a lighter underside, and the body is streamlined with a pointed snout and proportionally large eyes for locating prey in shallow water.

Biology and ecology

Blacknose sharks are active predators that feed mainly on small bony fishes, cephalopods and crustaceans. They are viviparous, meaning females give birth to live young after an internal gestation period. Litters tend to be small compared with larger sharks, and juveniles spend their early life in shallow coastal habitats that function as nursery areas.

Human interactions and conservation

These sharks are taken by both commercial and recreational fisheries, often as targeted catch or bycatch. Their coastal habits make them vulnerable to habitat degradation and fishing pressure. Management measures in some regions include catch limits, size restrictions and monitoring programs to reduce overexploitation and protect nursery areas.

Key facts

• Taxonomy: Carcharhinus group of requiem sharks (Carcharhinidae).
• Habitat: shallow coastal waters over sand, shell beds, coral rubble and seagrass.
• Size: small species, typically around 1–1.4 m at maturity.
• Reproduction: live-bearing with small litters and coastal nurseries.
• Conservation concerns: affected by fisheries and habitat loss; subject to regional management.

For more detailed range maps, biology, and management recommendations consult specialized resources and regional fisheries reports: species profiles, distribution summaries, and conservation assessments maintained by research institutions and fisheries agencies.