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Idiacanthus atlanticus

Idiacanthus atlanticus (commonly known as the black dragonfish) is a barbeled dragonfish of the family Stomiidae, found circumglobally in southern subtropical and temperate oceans between latitudes 25°S and 60°E, at depths down to 2,000 metres (6,600 ft). The species is sexually dimorphic: females are black with six stripes; male are brown, and lack the females' canine teeth, pelvic fins and barbel. Females are believed to make a diel vertical migration from deeper than 500 metres (1,600 ft) by day to surface waters at night, whereas males do not migrate, remaining below 1,000 metres (3,300 ft) at all times.

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