Black-tipped fins
Prominent black tips on fins, especially the first dorsal fin and the caudal fin, are distinctive.
Photo byCorentin Largeron
Species Guide
What to know about blacktip reef sharks
A clean field guide focused on habitat, identification, behavior, and conservation context without burying the useful parts.
The blacktip reef shark is a requiem shark identifiable by prominent black tips on its fins, especially the first dorsal and caudal fins. It inhabits tropical coral reefs of the Indian and Pacific Oceans and prefers shallow, inshore waters such as reef ledges and sandy flats, and can enter brackish and freshwater environments. Adults typically reach about 1.6 m (5.2 ft), with females larger than males. This species has very small home ranges and strong site fidelity, often remaining in the same local area for years. It is an active predator of small bony fish, cephalopods, and crustaceans, and has been recorded feeding on sea snakes and seabirds. Reproduction is viviparous: females give birth to two to five young on cycles reported as annual, biennial, or possibly biannual; reported gestation periods vary geographically. The species is generally timid and skittish, rarely posing a danger to humans unless provoked by food, though shallow-water wading can result in accidental bites. The blacktip reef shark is used for meat, fins, and liver oil.
Although widespread and relatively common overall, the species has declined in several areas due to overfishing of this slow-reproducing shark; it is assessed as Vulnerable by the IUCN.
Shows extremely small home ranges and strong site fidelity, often remaining within the same local area for up to several years.
Identification
How to identify blacktip reef sharks
The visual markers divers can use underwater, plus the species most likely to cause confusion.
Key identification markers
Size and shape
A relatively small reef shark reaching about 1.6 m (5.2 ft); females are larger than males.
Range and Movement
How blacktip reef sharks move through the world
The broad range, seasonal movement, or migratory behavior that shapes where divers encounter this species.
Shows extremely small home ranges and strong site fidelity, often remaining within the same local area for up to several years.
Diet
What blacktip reef sharks tend to eat
Useful feeding context that often explains habitat, movement, and encounter style.
Active predator of small bony fish, cephalopods, and crustaceans; has also been reported to feed on sea snakes and seabirds.
Conservation
What is happening with Blacktip Reef Sharks
Status, pressure, and protection context grounded in cited sources rather than filler.
Although widespread and relatively common overall, the species has declined in several areas due to overfishing of this slow-reproducing shark; it is assessed as Vulnerable by the IUCN.
Main threats
Overfishing
The species is taken for meat, fins, and liver oil; overfishing has caused declines in multiple locales.
Responsible Encounters
How to dive with blacktip reef sharks
Conservation-minded guidance for divers who want the encounter without adding pressure.
Typically timid and skittish; avoid feeding or provoking sharks. Be cautious when wading in shallow water to reduce risk of accidental bites.
Field Notes
Interesting things worth knowing
Useful species context that makes the encounter more meaningful once you are underwater.
Field notes
Viviparous reproduction
Females give birth to two to five live young; reported reproductive cycles and gestation lengths vary geographically.
Shallow-water specialist
Prefers shallow, inshore reef ledges and sandy flats and can enter brackish and freshwater environments.
Strong site fidelity
Individuals often remain within the same local area for years due to very small home ranges.
FAQ
Frequently asked questions
Clear planning and conservation answers written for search visibility and AI retrieval.
Research Sources
Blacktip Reef Shark information sources
Primary and credible references behind the field-guide and conservation claims on this page.
Sources 4Last Updated
Carcharhinus melanopterus, Blacktip reef shark · Reference · FishBase
Primary wildlife guide source.
Florida Museum · Reference · Florida Museum
Supporting wildlife source.
U.S. Fish & Wildlife Service · Reference · U.S. Fish & Wildlife Service
Supporting wildlife source.
Blacktip reef shark · Encyclopedia · Wikipedia
Supporting wildlife source.
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