• Pacific Blue Eye Signifer Rainbowfish (Pseudomugil signifer) - Tank-Raised!

Pacific Blue Eye Signifer Rainbowfish (Pseudomugil signifer) - Tank-Raised!

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These fish display an attractive yellow coloration on their fins that contrasts beautifully with their stunning, bright blue eyes.


The Pacific Blue Eye Signifer Rainbowfish (Pseudomugil signifer) is the most widespread and variable of the blue eye rainbowfish that inhabit the freshwater and brackish rivers and estuaries of coastal Western Australia.  It lives in very large schools in areas with dense vegetation, so it is an ideal candidate for the planted aquarium.  While some populations of this fish inhabit brackish or even fully marine water, it is not necessary to provide brackish water in the aquarium.  Males display brilliant yellow coloration on their bodies and fins, particularly while competing/posturing with other males. Females also possess this attractive coloration, but to a lesser extent. 

The Pacific Blue Eye Signifer Rainbowfish is generally peaceful with other fish species of similar size, but smaller shrimp fry may fall prey.  The most intense color will be displayed when this fish kept in schools of 6 or more, including multiple males, in a heavily planted, spacious aquarium to ensure that subdominant males are not overly harassed by dominant males.  As with many rainbowfish, darker substrate will also often result in better coloration. 

The entire family of rainbowfish is popular in freshwater aquaria due to the generally peaceful disposition, hardiness, and beautiful coloration of its members.  While many popular rainbowfish species eventually become too large to be kept with dwarf shrimp and some other nano species, the Forktail Rainbowfish is one of a few exceptions.  Fully grown Pacific Blue Eye Signifer Rainbowfish are typically safe to keep even with adult dwarf shrimp and virtually all non-aggressive invertebrates that we offer. 


What We Like About This Fish:
  • Active, schooling community fish that thrives in planted aquariums
  • Compatible with many invertebrates
  • Adults (especially males) display colorful, ornate finnage
  • Active and easy to feed
  • Temperature: 59° - 2° F (15° - 28° C), although 72° - 82° is optimal
  • pH: 6.5 - 7.5
  • KH: 12 - 15 dKH
  • Minimum Tank Size: 20 gallons
  • Diet: Omnivorous.  High quality dry foods will be accepted, but should be supplemented often with small, meaty frozen and live foods.
  • Social Behavior: Schooling/shoaling, should be kept in as large of groups as possible. Dominant males may attack or kill subdominant males in small aquariums. Peaceful with most other comparably-sized fish. 
  • Origin: Tank-raised, but indigenous to Eastern Australia.
  • Average Adult Size: 1.5 - 2.8 inches (3.5 - 7 cm)
  • Average Purchase Size: 1 inch (2.5 cm)
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