Lesser weever fish occur in the eastern Atlantic from the North Sea around the British Isles to Morocco and Madeira, and in the Mediterranean.

The lesser weever is littoral and benthic, living on sandy, muddy bottoms, ranging from a few meters deep to 150 m (in winter).

Common and minor symptoms include severe pain, itching, swelling, heat, redness, numbness, tingling, nausea, vomiting, joint aches, headaches, abdominal cramps, lightheadedness, increased urination and tremors.

Rare and severe symptoms include abnormal heart rhythms, weakness, shortness of breath, seizures, decreased blood pressure, gangrene, tissue degeneration and unconsciousness.

[4] The best first aid is to wash the wound, and then to immerse it in very hot water for at least an hour, to ease the pain and help destroy the protein-based venom.