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An electric fish is any fish that can generate electric fields. A fish that can generate electric fields is said to be electrogenic while a fish that has the ability to detect electric fields is said to be electroreceptive. Most electrogenic fish are also electroreceptive. Electric fish species can be found both in the ocean and in freshwater rivers of South America (Gymnotiformes) and Africa (Mormyridae). Many fish such as sharks, rays and catfishes can detect electric fields and are thus electroreceptive, but they are not classified as electric fish because they cannot generate electricity. Most common bony fish (teleosts), including most fish kept in aquaria or caught for food, are neither electrogenic nor electroreceptive.

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  • Electric fish
  • سمك رعاش
  • Poisson électrique
  • Pesci elettrofori
  • Ryby elektryczne
  • Peixe-elétrico
  • Электрические рыбы
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  • سمك الرَّعَّاش أو السمك الرعاد واحد من أسماك مزودة بعضلات خاصة قادرة على توليد تيار كهربائي. وتولِّد الأسماك الرعّاشة صدمات كهربائية قوية لحماية نفسها من الأعداء، وتدوّخ أو تقتل فريستها. وتقوم كذلك بتفريغ تيارات كهربائية أضعف لكشف الحيوانات والأشياء في المياه الطينية حيث تعيش. وينتج نوع من هذا السمك، يسمى الأَنقليس الرعاد الموجود في أمريكا الجنوبية، أكثر الصدمات الكهربائية قوة. فيستطيع إنتاج كهرباء كافية لتدويخ إنسان. ويعيش سمك السلُّور الرعّاش في الأنهار في إفريقيا الاستوائية.
  • On appelle poisson électrique les poissons capables d'utiliser un courant électrique pour s'orienter, pour se protéger ou pour communiquer.
  • Ryby elektryczne – ogólne określenie gatunków ryb, które posiadają zdolność wytwarzania pola elektrycznego lub odbierania jego obecności i zmian. Ryby takie występują w wielu niespokrewnionych ze sobą grupach systematycznych. Ich ciało zaopatrzone jest w narządy elektryczne – umożliwiające wytwarzanie impulsów elektrycznych w celu samoobrony lub obezwładnienia ofiary – bądź w elektroreceptory umożliwiające wykrywanie obecności oraz zmian pola elektrycznego. W węższym znaczeniu za ryby elektryczne uznawane są gatunki, u których występują narządy elektryczne
  • Электрические рыбы — рыбы, способные генерировать электрические разряды. К таким рыбам относятся рыбы пяти групп: * морские звездочеты (Astroscopus), * гимнархи (Gymnarchus), * электрические сомы (Malapterurus), * электрические скаты (Tetronarce), * электрический угорь (Electrophorus electricus). Электрические рыбы имеют также способность к электрорецепции. По величине вырабатываемого напряжения делятся на сильноэлектрических и слабоэлектрических. Электрические свойства используют для защиты, нападения, внутривидовой сигнализации и ориентации в пространстве.
  • An electric fish is any fish that can generate electric fields. A fish that can generate electric fields is said to be electrogenic while a fish that has the ability to detect electric fields is said to be electroreceptive. Most electrogenic fish are also electroreceptive. Electric fish species can be found both in the ocean and in freshwater rivers of South America (Gymnotiformes) and Africa (Mormyridae). Many fish such as sharks, rays and catfishes can detect electric fields and are thus electroreceptive, but they are not classified as electric fish because they cannot generate electricity. Most common bony fish (teleosts), including most fish kept in aquaria or caught for food, are neither electrogenic nor electroreceptive.
  • I pesci elettrofori, detti anche pesci elettrici e pesci elettrogenici, sono pesci in grado di generare autonomamente dei campi elettrici, generalmente tramite organi appositi di origine muscolare. È opportuno notare che molti pesci, privi di tale organo, sono comunque in grado di rilevare la presenza di un eventuale campo elettrico esterno: tali pesci, definiti elettrorecettivi, non rientrano nella categoria degli elettrofori, in quanto in grado unicamente di captare, ma non di produrre, elettricità (è invece generalmente vero il contrario, in quanto i pesci elettrofori sono spesso anche elettrorecettivi). Fra i pesci elettrorecettivi, si annoverano molte specie di squali, razze e pesci gatto; tutti questi possiedono una capacità anche buona di rilevare i campi elettrici, capacità che sfr
  • Peixe-elétrico (como o poraquê do Brasil) é uma denominação comum dado às espécies de peixe, quer de água doce, quer de água salgada, de gêneros diversos, dotados de células especiais em região específica do corpo (parte médio-posterior, até a cauda), capazes de gerar diferenças de potencial elétrico e suscetíveis de, por associação em série, desenvolver capacidade de descarga externa total apreciável, a variar de poucas dezenas a muitas centenas de volts, em correntes também variáveis de fração de um a alguns ampères, os valores destas correntes a dependerem da resistência elétrica do receptor (presa aquática ou ameaça potencial ou ser humano em encontro eventual).
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