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Vertical fins are used mainly for stabilization. Paired pectoral and pelvic fins are used primarily for stability when a fish hovers, but sometimes may be used to aid rapid forward motion.
In the female, the basal part of all the vertical fins are black. In the male, the whole dorsal fin is a deep black, the anal fin blackish red, and the pelvic fins are reddish.
 See also: Water, Plants, Origin, Dorsal, Species
  
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