Whitetip reef shark
Small Indo-Pacific reef shark with white-tipped fins
The whitetip reef shark is a small requiem shark common on coral reefs across the Indo-Pacific. It rests in caves by day and hunts at night, using its slender body to reach prey in crevices.
- Only extant species in genus Triaenodon
- Can rest on bottom without swimming
- Hunts in narrow reef crevices at night
- Returns to same cave shelter for years
- Vulnerable to overfishing due to slow breeding
What it is
This requiem shark has a slender build and a short, broad head. Its snout is blunt with tubular skin flaps near the nostrils. The eyes are oval with vertical pupils. Distinctive white tips mark the first dorsal fin and upper tail lobe. The body is greyish-brown above and white below, often with small dark spots. It lacks a ridge between its two dorsal fins. The skin feels smooth due to small overlapping denticles.
Where it lives
Found widely across the Indo-Pacific, this shark lives from South Africa and the Red Sea to Central America. It inhabits coral reefs, lagoons, and sandy flats in clear water. Most individuals stay near the bottom at depths of 8 to 40 metres. Rare sightings occur in very shallow water or as deep as 330 metres. It does not live in the Atlantic Ocean.
How it lives
Unlike many relatives, it can pump water over its gills while resting motionless. It spends days in caves or lava tubes, often in groups. At night, it hunts bony fish, crabs, and octopus. Its slim shape allows it to squeeze into reef crevices. It is sensitive to low-frequency sounds and electrical cues. Home ranges are small, and sharks often return to the same shelter for years.
Breeding and life cycle
Females carry developing embryos via a placental connection. Mating involves males biting the female’s fins and holding her pectoral fin. Gestation lasts 10 to 13 months. Litters contain one to six pups, usually two or three. Birth timing varies by region, occurring in summer or winter months depending on location. Females reproduce every two years.
Fish and people
Fishers catch this species for food, though ciguatera poisoning risks exist. Spear fishers may be bitten if sharks attempt to steal catches. They are rarely aggressive toward swimmers but may investigate closely. Unregulated fishing threatens populations due to their slow reproduction. They are a common sight for divers in the Indo-Pacific.
Status and threats
The IUCN lists this shark as Vulnerable. Numbers are declining due to unregulated fishing across its range. Its limited habitat preference and slow reproductive rate make it sensitive to overfishing. Conservation efforts are needed to protect reef ecosystems where it lives.
Questions people ask about Whitetip reef shark
Is the whitetip reef shark dangerous to humans?
It is rarely aggressive but may investigate swimmers closely. Spear fishers face higher risk if sharks try to steal their catch. Most interactions are harmless, though caution is advised around feeding activity.
Where does the whitetip reef shark live?
It inhabits coral reefs across the Indo-Pacific, from South Africa to Central America. It prefers clear water near the bottom, typically at depths of 8 to 40 metres, often resting in caves during the day.
What does the whitetip reef shark eat?
It feeds mainly on bony fishes, octopus, spiny lobsters, and crabs. It hunts at night, using its slender body to extract prey from narrow crevices and holes in the reef structure.
How big do whitetip reef sharks get?
Most adults do not exceed 1.6 metres in length. The maximum reported length is 2.1 metres, and the heaviest recorded weight is 18.3 kilograms. They are considered a small shark species.
Good reading and sources
- Whitetip reef shark on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Whitetip reef shark", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
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