Electrolux addisoni

Electrolux Addisoni

Electrolux addisoni

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Electrolux addisoni (Ornate sleeper ray) is a species of electric ray and the only member of the genus Electrolux. It lives on reefs feeding on polychaete worms and small crustaceans, it has only been seen by divers to feed during the daytime. It is endemic to the coast of South Africa. It was first recorded in 1984 but was not described until 2007. It was ranked as the number one newly described species of 2007 by the International Institute for Species Exploration.


Electrolux addisoni is easily distinguished from other narcinids by its striking colour pattern consisting of a dark brown dorsal surface of the disc with numerous small pale yellow spots and a series of concentric black stripes. It can also be distinguished by its large spiracular papillae, through which eggs are released. Along with Heteronarce it is the only genus in the family Narkidae that has two dorsal fins. The conspicuous colour pattern of the species may act as a warning signal to other animals, when closely approached the ray has been seen to make a possible threat display. The holotype pictured weighed 1.8 kg and had a total length of 515 mm. This makes it one of the largest species of Narkidae recorded, although no female specimens have been collected and measured.


Electrolux addisoni has been recorded in four...
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