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Down Cat-eLog Data Sheet
Scientific Name Noturus gyrinus  (Mitchill, 1817)
Common Names Tadpole Madtom
Haletudse-giftmalle (Denmark)
Type Locality Wallkill Creek [= Walkill River], New York, U.S.A.
Synonym(s) Silurus gyrinus
Pronunciation no two russ - jai ree nuss
Etymology From the Greek notos, meaning back and oura, meaning tail. In reference to the confluent adipose and caudal fins. From the Greek gyrinus, meaning tadpole. In reference to the distinctive body form of this species.
Down Species Information
Size 130mm or 5.1" SL. Find near, nearer or same sized spp.
Identification Short, stocky body. Terminal mouth with equal jaws. Posterior edge of pectoral spine without distinct serrations, golden yellow to dark chocolate brown body with dark midlateral stripe, 13-18 anal-fin rays.
Sexing Breeding male with swollen lips, enlarged cephalic epaxial muscles, and large bulbous genital papilla. Female with papilla with deep median groove ending in a small bump.
General Remarks W. Ralph Taylor (revised madtom catfishes in the 1960s) stabbed himself with each species of Noturus to try and discover which had the worst toxin. This dedicated research led him to the conclusion that this species, the tadpole madtom, was the worst.
Down Habitat Information
Distribution North America: Atlantic and Gulf Slope drainages from New Hampshire to Nueces River in Texas, USA; St. Lawrence-Great Lakes, Hudson Bay (Red River), and Mississippi River basins from Quebec to Saskatchewan in Canada and south to Gulf of Mexico in USA.
Gulf Coast Drainages, Mississippi (click on these areas to find other species found there)
Gulf Coast Drainages, Mississippi, Missouri (click on these areas to find other species found there)

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IUCN Red List Category Least Concern, range map and more is available on the IUCN species page. Last assessed 2012.
pH 6.2 - 7.0
Temperature 16.0-22.0°C or 60.8-71.6°F (Show species within this range)
Other Parameters Good aeration but strong current unnecessary.
Down Husbandry Information
Feeding Readily feeds on live and frozen foods. Madtoms appear to have difficulty in digesting earthworms and tubificid worms (even though they will gorge themselves when offered), and should not be fed these foods.

May also adapt to prepared foods in the aquarium. User data.
Furniture A gravel bottom is not neccesary for this species. Provide a bottom of sand mixed with peat moss, PVC pipes, flat rocks and vegetation.
Compatibility Suitable for a coldwater community tank. Ideal tankmates include small- to mid-sized North American native fishes such as shiners and darters.
Suggested Tankmates Ideal tankmates include small to midsized North American native fishes such as darters and shiners.
Breeding The northern populations spawn in May-August, although gravid females have been found in southern populations as early as April.

This species spawns in shelter and may use discarded containers for nesting sites. Both parents help to guard the nest and care for eggs (typically 93-150 in a clutch). The fish move over the egg mass in a shivering motion, with the anal fin in contact with the eggs, or take part of the egg mass into their mouths and spit it out.
Breeding Reports There is no breeding report.
Down Further Information
Reference American Monthly Magazine and Critical Review v. 1, pp 289.
Registered Keepers There are 14 registered keepers, view all "my cats" data.
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There are 10 records of this fish being seen, view them all.
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Last Update 2020 Sep 20 01:54 (species record created: 2001 Apr 25 00:00)