Whitetip Reef Shark (Triaenodon obesus)

Fish · GBIF taxon 2418054

Whitetip Reef Shark

Triaenodon obesus

Also known as Blunt-head Shark, Whitetip Shark

Whitetip reef sharks are agile, bottom-dwelling predators easily recognized by the brilliant white tips on their dorsal and tail fins. Unlike many open-water sharks, they can actively pump water over their gills, allowing them to rest motionlessly on the seabed or inside dark reef caves during the day. At night, they weave through narrow coral crevices in small groups, flushing out sleeping fish and octopuses from tight hiding spots.

Coral ReefNocturnalCarnivore

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—observations

—countries

—peak records

VulnerableConservation status

Key facts

Diet & prey

Damselfish
Octopus
Crabs

Predators

Tiger Shark
Galapagos Shark
Giant Grouper

ThreatsOverfishing, coral habitat degradation, accidental bycatch

HabitatsCoral reefs, lagoons, shallow coastal slopes

Life span20–25 years

Size / weightNot available

Classification

OrderCarcharhiniformes
FamilyCarcharhinidae
GenusTriaenodon
SpeciesTriaenodon obesus

Range & activity

Range data is not available yet.

Safe observation

Interaction riskHigh

Low
Moderate
High
Very high

Why interaction risk is high: Generally placid toward divers, but capable of biting if cornered, baited, or harassed.
Why it is dangerous: Sharp teeth and powerful jaws can inflict serious puncture wounds if the shark is cornered, baited, or harassed.
How to recognize a risky encounter: Slender grey body, short broad snout, and conspicuous white tips on the first dorsal and upper tail fins.
What to do: Give resting sharks space in caves, maintain a safe distance while diving, and never attempt to feed or touch them.
What to notice: Slender reef-dwelling shark with conspicuous white tips on dorsal and tail fins, often resting on sandy seabed floors.
Support conservation: Avoid approaching resting individuals in caves, minimize torch light directly in their eyes, and respect marine protected area rules.

Responsible observation

Cave Etiquette: Avoid blocking cave entrances where sharks rest during daylight hours to prevent stress.
Night Diving: Observe foraging behavior using diffused dive lights, avoiding direct beams in their eyes.
Safe Observation: Maintain a calm posture in the water and avoid making sudden movements or trailing speared fish.