Photo courtesy of Aquascape fish imports

 

Sciades seemanni (Arius seemani)

 

Overview:

    Not one of the best choices in aquarium fish the Columbian shark is becoming more common in the trade. Freshwater when young and Brackish when mature the Columbian shark can reach a length of Two feet, although one foot is more the norm.

Quick stats:

 

Listed tank sizes are the minimum
Size: 12-14 + inches (30-35cm)
Tank: 48 inches minimum for young
Strata: Lower to middle
PH: 6.8 to 8.0
Hardness: Medium hard to hard, 8-30 dH
Temperature: 75°F to 80°F (25-27°C)

Classification:

Order: Siluriformes
Suborder: Siluroidei
Family: Ariidae
Genera: Arius
Species: seemani

 

Common name:

 

Columbian shark 

    Silver-tipped Shark, Shark catfish, Bull shark

Distribution

    Pacific Rivers from southern California to Colombia

General Body Form:The body is elongated and silver in color . The head is broad, with a large mouth. The eyes are large and protrude from the head. The Columbian shark possesses three pairs of barbels, one on the upper jaw and two on the lower area.

 

photo courtesy of Aqualand pets plus

Coloration:Not one of the most colorful of fish, the Columbian shark is a basic sliver in color with a white underside. The fins are black and white-tipped. The color contrasts fade with age.

Maintenance:Although sold as a freshwater catfish, the Colombian shark is best suited for the Brackish aquarium. Like most Brackish species, the young are more tolerant of water conditions than the adults. The water should have some sea salt added and measure a salinity of 1.005 to 1.015. The tank itself must be very large with good filtration and water movement. The tank can be decorated in dark colors with a thin layer of sand. Use rockwork to create caves and other hiding places. They are a predatory fish and should be housed with species that cannot be eaten. Feeding is not a problem as they will accept all types of prepared food. Sinking pellets, live insects, earthworms and small fish are some of its favorites. They have a voracious appetite and if not well fed will harass the other tank mates.

photo courtesy of Aqualand pets plus

When kept in saltless water, Columbian sharks develop usually lethal skin conditions.

 

Biotope:Rivers and estuaries of their home range

Breeding:

Has been observed in the wild, but not spawned in the aquarium. It takes places in brackish and freshwater river estuaries. Around 100 large-sized eggs are mouth-brooded by the male.

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