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  • Silurus microdorsalis
Jump to next section Cat-eLog Data Sheet
Scientific Name Silurus microdorsalis  (Mori, 1936)
Common Names Slender Catfish
Miyoogi ()
Type Locality Rakuto River at Ei-yo, southern Chosen, Korea.
Pronunciation See loo russ
Etymology From the Greek silouros which is the name of the fish. The specific epithet, microdorsalis, means "with a small dorsal fin".
Jump to next section Species Information
Size 250mm or 9.8" SL. Find near, nearer or same sized spp.
Identification As the name suggests, S. microdorsalis possesses a very small dorsal fin. In addition, adult size is much smaller than the other Silurus species living in its native waters.
Sexing Males much more slender than females, the latter which swell to twice their normal size when ripe with eggs
General Remarks At a maximum length of just 25cm, this fish is the dwarf of the genus and far more suited for the average aquarist
Jump to next section Habitat Information
Distribution Endemic to Korea where it is found in nearly all waterways.
pH 6.5 - 7.5
Temperature 15.0-25.0°C or 59-77°F (Show species within this range)
Other Parameters This fish can tolerate considerably lower temperatures for short periods of time
Jump to next section Husbandry Information
Feeding Eats worms, crustaceans, insects and small fish. Frozen and pellet foods are accepted in captivity.
Furniture Provide outcrops of stones that the fish can swim in and around. Ceramic or PVC pipes, if supplied will be used as a cave. The substrate can be sand or fine gravel. Plants and wood decorations are a welcome addition and the fish will lounge on them on occasion but be sure to leave open water for swimming.
Compatibility Peaceful with members of its own species
Suggested Tankmates Tankmates should be large enough not to be eaten. Fishes from the same region safe to house with it include Hemibarbus labeo, large Carassius auratus, and the Coreoperca spp.
Breeding A breeding report in the Korean language book Korean Freshwater Fish (Pet Care vol. 4) states that courtship activity occurs over a 3 to 7 day period. During that time, the pair selects a spawning site among large gravel and stones. The males will frequently nudge the females belly and ventral regions and appears to assist in pressing the eggs out. Eggs are attached to the side or tops of stones and guarded by the male until hatching, The small fry feed first in infusoria but grow rapidly and can soon take newly hatched brine shrimp and finely powdered foods. In nature, spawning occurs in May/June and by September the fry have generally reached about 5cm in length.
Breeding Reports There is no breeding report.
Jump to next section Further Information
Reference Dobutsugaku Zasshi = Zoological Magazine Tokyo v. 48 (nos 8-10), pp 671, Pl. 24 (fig. 1)
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Last Update 2018 Nov 15 04:46 (species record created: 2013 Sep 08 02:22)