Fish
Lesser Weever
Echiichthys vipera
In the sandy shallows of a summer beach at low tide, a lesser weever lies buried, with only its eyes and a black fin showing above the sand.
Overview
The lesser weever, Echiichthys vipera, is a Least Concern fish of sandy shallows along the north-eastern Atlantic, the North Sea, and the Mediterranean. Its buried ambush hunting and venomous spines make it a well-known stinger of European sandy beaches.
A beach hazard with a purpose
The weever’s venom is a defence, not a weapon for hunting, and the fish stings people only when trodden on, which is why shuffling feet through shallow water is often advised.
Status
Least Concern, widespread and common.
Lesser Weever: common questions
Is the lesser weever dangerous?
Its black dorsal spines are venomous, and a sting from a trodden-on fish causes intense pain and swelling, though it is rarely dangerous.
What should you do if stung by a lesser weever?
The usual first aid is to immerse the affected foot in water as hot as can be tolerated, which eases the pain, and to seek medical advice if needed.
How does the lesser weever hide?
It buries itself in sand with only its eyes, mouth, and black dorsal fin showing, waiting to ambush prey.
How big is the lesser weever?
It usually reaches only 10 to 14 cm in length.