dither fish
a fish added to an aquarium with shy or nervous fish. A dither fish has a relaxed behaviour which encourages the other fish to come come out of hiding or to commence breeding

Dictionary of ichthyology. 2009.

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  • Dither fish — The term dither fish refers to an arbitrary group of aquarium fish used by cichlid keeping aquarists to reduce innate timidity in some species of cichlids (Barlow, 1967). Dither fish swim around the top of a tank and this behavior lets shier fish …   Wikipedia

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  • Marine aquarium — See also: Reef aquarium A marine aquarium …   Wikipedia

  • Cichlid — Cichlids Common freshwater angelfish, Pterophyllum scalare Scientific classification Kingdom …   Wikipedia

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  • Community aquarium — Community aquaria are tanks that are designed to contain more than one species of fish. Most commonly they include a variety of species that do not normally occur together in nature, for example angelfish from Brazil, swordtails from Mexico, and… …   Wikipedia

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