Winghead Shark
CR

Winghead Shark

Eusphyra blochii

Declining

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Winghead_shark

Overview

The winghead shark is a distinctive member of the hammerhead family, easily recognized by its extremely wide, wing-like cephalofoil, which can extend nearly half the length of its body. This structure enhances maneuverability and improves detection of prey, such as small bony fish, shrimp, and cephalopods, using electroreceptors distributed across its expanded head. Reaching around 1.5 to 1.9 meters in length, this species is a fast-swimming, active predator that plays a role in regulating prey populations in nearshore food webs.

It is viviparous, giving birth to live young after a gestation period, with relatively small litter sizes that limit its capacity for rapid population recovery.

This shark inhabits shallow coastal and inshore waters, including estuaries, river mouths, and continental shelves, across a broad range spanning the Indo-West Pacific and extending into parts of the Middle East and South Asia. It has been recorded in countries including Australia, India, Indonesia, Pakistan, Thailand, and many others bordering the Indian Ocean and western Pacific.

Its decline is driven by intense fishing pressure throughout its shallow-water range, including targeted capture for the shark fin trade and incidental bycatch in gillnet and trawl fisheries. Coastal habitat degradation from aquaculture expansion, dredging, urban development, and agricultural runoff further reduces available nursery and feeding grounds. Its low reproductive output compounds these pressures, slowing any potential recovery.

Conservation efforts include regional fisheries management measures, bycatch reduction initiatives, and international trade regulation under CITES. However, enforcement remains inconsistent across much of its range. Given ongoing habitat loss and fishing mortality, the species' population trend continues to decline, and its long-term outlook remains precarious without stronger, range-wide protective measures.

The Winghead Shark is mainly threatened by getting caught in fishing nets and trawls, both as a target catch and as accidental bycatch, with its fins often sold into the shark fin trade. Its coastal habitats are also being damaged by activities like shrimp/fish farming, sand and mineral mining, dam construction, coastal urban development, and farmland expansion near shorelines. Because this species reproduces slowly, it cannot easily recover from these combined pressures, and since all these threats remain active and ongoing, the overall risk to the species appears to be intensifying.

Threat summary

Habitat

Winghead sharks inhabit shallow coastal waters, estuaries, and continental shelf areas throughout the tropical Indo-Pacific, typically found at depths of 5-40 meters. They prefer muddy or sandy bottoms near river mouths and mangrove systems, which serve as critical nursery habitats for juveniles.

Marine oceanic· majorMarine coastal/supratidal· majorWetlands (inland) - Permanent rivers/streams· major

Conservation measures underway

Site/area protectionLegislation

Frequently asked questions

Why is Winghead Shark classified as Critically Endangered?
Winghead Shark is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. The Winghead Shark is mainly threatened by getting caught in fishing nets and trawls, both as a target catch and as accidental bycatch, with its fins often sold into the shark fin trade. Its coastal habitats are also being damaged by activities like shrimp/fish farming, sand and mineral mining, dam construction, coastal urban development, and farmland expansion near shorelines. Because this species reproduces slowly, it cannot easily recover from these combined pressures, and since all these threats remain active and ongoing, the overall risk to the species appears to be intensifying.
Where does Winghead Shark live?
Winghead Shark occurs in Australia, Bahrain, Bangladesh, Brazil, Brunei, and Cambodia (plus 23 other countries). Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Winghead Shark?
The main threats to Winghead Shark are 1.1, 2.1, 2.4, and 3.2. The full IUCN-classified threat record for this species is detailed on the species page.

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