Kyushu bitterling

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Kyushu bitterling
Rhodeus atremius atremius by OpenCage.jpg
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cypriniformes
Family: Cyprinidae
Subfamily: Acheilognathinae
Genus: Rhodeus
Species: R. atremius
Binomial name
Rhodeus atremius
  • Acanthorhodeus atremius Jordan & Thompson, 1914

The Kyushu bitterling (Rhodeus atremius) is a temperate freshwater fish belonging to the Acheilognathinae subfamily of the Cyprinidae family. It originates on Kyushu Island in Japan. It was originally described as Acanthorhodeus atremius by Jordan & Thompson in 1914.[2] The fish reaches a size of up to 6 cm (2.5 in), and is native to freshwater habitats with a pH of 6.8 to 7.8, a hardness of 20 DH, and a temperature of 10 to 25 °C (50 to 77 °F).

When spawning, the females deposit their eggs inside bivalves, where they hatch and the young remain until they can swim.

There are two currently recognised subspecies, Rhodeus atremius atremius and R. a. suigensis.[1]


  1. ^ a b Devi, R. & Boguskaya, N (2009). "Rhodeus atremius". The IUCN Red List of Threatened Species. IUCN. 2009: e.T62206A12581319. doi:10.2305/IUCN.UK.2009-2.RLTS.T62206A12581319.en. Retrieved 14 January 2018. 
  2. ^ Froese, Rainer and Pauly, Daniel, eds. (2007). "Rhodeus atremius" in FishBase. February 2007 version.