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Pacific electric ray females are larger than their male counterparts, measuring 164 cm (65 in) in width (their pectoral disc) and a total of 137 cm (54 in) in length. Male Pacific electric rays are 92 cm (36 in) in width and 110 cm (43 in) in length. [15] Both sex's pectoral fin disc width is roughly 1.2 greater than their length. [13]
The electric rays are a group of rays, flattened cartilaginous fish with enlarged pectoral fins, composing the order Torpediniformes / t ɔːr ˈ p ɛ d ɪ n ɪ f ɔːr m iː z /.They are known for being capable of producing an electric discharge, ranging from 8 to 220 volts, depending on species, used to stun prey and for defense. [2]
Narcine entemedor, the giant electric ray or Cortez electric ray, is a species of numbfish, family Narcinidae, native to the eastern Pacific Ocean from the Gulf of California to Panama. [2] It is found in shallow water on sandy bottoms and sometimes adjacent to reefs . [ 3 ]
Narcine brevilabiata Bessednov, 1966 (Short-lip electric ray) Narcine brunnea Annandale, 1909 (Brown numbfish) Narcine entemedor D. S. Jordan & Starks, 1895 (Giant electric ray) Narcine insolita M. R. de Carvalho, Séret & Compagno, 2002 (Madagascar numbfish) Narcine leoparda M. R. de Carvalho, 2001 (Leopard electric ray)
The largest species is the Atlantic torpedo, Tetronarce nobiliana, which can grow to a weight of 90 kg (200 lb) and deliver a 220-volt electric shock. Electric rays have patches of modified muscle cells called electroplaques that make up an electric organ. These generate an electric gradient, similar to the normal electric potential across most ...
Pacific Gas & Electric Co. could receive up to $15 billion in federal loans to help the utility modernize its power grid and expand clean energy infrastructure across central and northern ...
Tetronarce is a genus of rays, commonly known as electric rays. They are slow-moving bottom-dwellers capable of generating electricity as a defense and feeding mechanism. Tetronarce species tend to attain a much larger size (up to 180 cm TL) than Torpedo species, which are usually small to moderate sized (range from 25 to 80 cm TL) electric ...
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