31/05/2026
Weever Fish
It's the time of year when we need to be aware of weever fish. Below is some information from the RNLI, The Wildlife Trusts, and the NHS.
There are two species of weever fish, lesser and great, and they are some of the only venomous fish found in UK waters. They spend most of their lives buried in the sand, but when disturbed, they shoot up their black dorsal fin in defence, injecting a painful venom into unsuspecting victims!
How to Treat a Weever Fish Sting
Follow these actionable NHS guidelines and RNLI recommendations:
DO:
◦ Rinse the wound with seawater (do not use fresh water, as it aggravates the sting).
◦ Extract any spines that remain in the skin using tweezers or the edge of a bank card.
◦ Soak the affected area in very warm water (as hot as can safely be tolerated) for at least 30 minutes. Heat neutralizes the venom.
◦ Take painkillers like paracetamol or ibuprofen to help with discomfort.
DON'T:
Do not use ice or cold packs.
Do not touch the spines with bare hands.
Do not p*e on the sting (it is unsanitary and does not help the venom).
When to Seek Medical Help
If you are on a lifeguarded beach, seek out the lifeguards immediately—they are highly experienced in treating weever fish stings.
According to NHS advice, you should visit a minor injuries unit if:
• The severe pain does not go away after soaking.You were stung near the eyes, mouth, or throat.
Dial 999 for an ambulance immediately if you have a severe reaction (such as breathing difficulties, nausea, or dizziness).
How to Avoid Stings
• Wear Footwear: Wear jelly shoes, wetsuit boots, or old trainers when paddling in shallow water.
• Shuffle Your Feet: Instead of lifting your feet up in the water, drag or shuffle them along the sand. This disrupts the sand and scares buried fish away before you step directly onto one.
Added Winter edit
During the winter, lesser weever fish migrate away from the shallow shorelines into deeper, warmer offshore waters to hunt. While it is incredibly rare to encounter them on beaches during the colder months, they remain active in deeper sea beds.
Because they move out of shallow paddling and swimming areas, the risk of stepping on one on the beach is drastically reduced compared to the summer months.
The greater weever fish is found offshore in deeper water year round.