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13 Mar 2026

ALERT: Irish beachgoers warned over poisonous fish amid 28C sun blast

This small fish found in most coastal areas in Ireland has poisonous venom in their fins

ALERT: Irish beachgoers warned over poisonous fish amid 28C sun blast

Irish beachgoers watch out for poisonous fish in coastal waters

Reporter:

Rachel Kavanagh

09 Jul 2025 3:52 PM

As the hot and sunny weather kicks in across the country, Irish beachgoers and swimmers are urged to be careful amid the presence of a poisonous fish in coastal waters.
This comes as a warning is issued by the National Poisons Information Centre on Facebook ahead of the incoming heatwave in Ireland where temperatures are set to reach 28 degrees.
As people are likely to flock to coastal areas to enjoy the sunny weather at the beach, a warning has been issued to watch out for the Weeverfish which is a type of fish found in all parts of the Irish coast.
The fish is only found in sandy areas, usually in warm shallow waters in the hour before and after low tide.
"Unlike most fish, they have no swim bladder, meaning that they sink to the bottom as soon as the stop swimming. They are, therefore, difficult to see because they spend most of their time buried under the sand. The have sharp spines containing venom on their dorsal fin."
What to expect, according to the National Poisons Information Centre:
  • Standing on a Weeverfish results in immediate intense, burning pain.
  • The pain is most intense in the first 2 hours and can result in swelling, numbness and warmth.
What to do:
  • Seek assistance from a lifeguard, if available.
  • Submerge the affected limb or wound in hot water, as hot as can be tolerated for up to 90 minutes or until pain is easing.
  • As the sting can result in numbness, immerse the unaffected limb too, as this may prevent inadvertent scalding.

  • Cold applications may worsen the discomfort.
  • Paracetamol can be considered to relieve pain. Care should be taken when pain relief is given that thermal burns do not occur due to the effects of the pain killer masking the temperature of the water used.
  • The puncture site should be examined and embedded spines removed.
  • Seek medical attention from a doctor as a tetanus and/or antibiotics may be required.
  • Call the NPIC on 01 8092166 if you stand on a Weeverfish.

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