Chologaster

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title: "Chologaster" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["amblyopsidae", "fauna-of-the-southeastern-united-states", "fish-of-the-united-states", "fish-described-in-1853"] description: "Species of fish" topic_path: "geography/united-states" source: "https://en.wikipedia.org/wiki/Chologaster" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Species of fish ::

| image = Chologaster cornuta 471931908.jpg | status = LC | status_system = IUCN3.1 | status_ref = | genus = Chologaster | parent_authority = Agassiz, 1853 | species = cornuta | authority = Agassiz, 1853 | synonyms = {{species list |Chologaster cornutus|Agassiz, 1853 |Chologaster avitus|Jordan & Jenkins in Jordan, 1889}}

Chologaster cornuta, commonly named swampfish, ricefish, or riceditch killifish, is a freshwater fish of the family Amblyopsidae. It is the only living species of the genus Chologaster. It only lives in US rivers in the Atlantic Coastal Plain drainages, from southeast Virginia to central Georgia. It lives up to two years. The Latin name refers to a very tiny horned bulge at front of the eye. They are commonly 4 cm long, but may reach about 6.8 cm.

::figure[src="https://upload.wikimedia.org/wikipedia/commons/d/df/Chologaster_cornuta.jpeg" caption="1907 illustration"] ::

Characteristics

This species is part of the family Amblyopsidae (typically known as cavefish or blindfish). It is dorsally brown and ventrally creamy white, with three dark stripes on each side. It inhabits above-ground swamps, rather than caves as most other species in its family. Although many Amblyopsidae species have vestigial eyes, the swampfish has functional eyes.

Behavior

Chologaster cornuta feeds mostly at night, on small crustaceans and aquatic insects. It spawns in March and April. Although locally common, individuals are hard to spot because they are largely nocturnal and found in heavily vegetated waters. They are highly sensitive to touch and light, and will quickly move away from a source of either, hiding on the bottom until dark. Its thigmotaxic tendency is shown by the difficulty in seining it from the roots and debris of its preferred habitat along edges of submerged weed banks which border sand-bottomed channels.

This fish is found over vegetation and debris in swamps, sloughs, and quiet pools and backwaters of streams. They prefer highly oxygenated water and have a high temperature tolerance. They are found year-round in small and well-shaded open streams, where temperatures don't exceed 23 °C. This habitat is rich in potential food for C. cornuta, such as amphipods, ostracods, and copepods.

References

References

1. NatureServe. (2013). "''Chologaster cornuta''".
2. {{FishBase. Chologaster. cornuta. (2017)
3. Cohen, Daniel M.. (1998). "Encyclopedia of Fishes". Academic Press.
4. "''Chologaster cornuta'' - Swampfish".

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::