[Poisonous fish: first aid in cases of poisoning].

The author reveals aspects regarding the main fish species, vertebrate marine animals, having a habitat in our coastal area or which frequently visit our coasts which can produce some sort of poisonous lesion in humans whenever humans come into contact with these fish in their natural environment either accidentally or be being handled, especially while fishing. The author describes and identifies the species most frequently found in Spanish waters, pointing out their characteristics as well as the lesions they can produce, highlighting their symptoms and the corresponding recommended treatment in situ and in health centers.