- Scientific name: Ariopsis seemanni
- Synonyms: Sciades seemanni, Arius jordani, Hexanematichthys seemani, Tachisurus seemani, Arius seemanni
- Common name: Shark Catfish, Colombian Shark Catfish
- Group: Brackish fishes
- Habitat: South America, Central America; From Mexico to Peru
- Size: 35 cm
- Biotope: Inhabits in estuaries of tidal rivers and lagoons.Usually found in brackish conditions, but can also withstand full marine water.
- Social behavior: A relatively peaceful species that gets along with larger cichlids.
- Diet: Omnivorous; but prefers insect larvae. Frozen foods, mosquito larvae, tubifex. After training, tablet foods are accepted, however flake food is preferably taken from the water surface.
- Breeding: Reproduction in an aquarium has not been successful.
- Tank: Minimum 380 litres (For the juveniles)
- Population: 4 fish for 800 litres
- Decoration: Provide good filtration with adequeate current. Larger specimens over 12 cm become restless and require plenty of swimming space (migration drive). Provide caves for hiding, dark substrate and subdued lighting. Addition of salt: 2% = 200g/100 litres. Aquatic plants aren't recommended.
- Temperature: 22-27 °C
- pH: 6.8-8
- Hardness: 8-30NK°
- Lifespan: 10-15 years
Description: A freshwater fish which often enters brackish waters of the Pacific. The Colombian Shark Catfish is a pretty, lively catfish when young. The body of the Colombian Shark Catfish is elongated and silver in color while the belly is white. The fins are black and white-tipped. The head is broad, while the mouth and the eyes are relatively large. They look like as a small shark. The Columbian shark possesses three pairs of barbels, one on the upper jaw and two on the lower area. However, the colors fade with age and progressively larger aquaria with an increased salt content become necessary. Adult fish can be kept in brackish or even full marine conditions. Extreme caution should be exercised when handling this fish, because they have venom-producing glands at the base of the first dorsal spine. If stung, the wound should be immersed in hot water, and medical advice should also be sought. They can also produce croaking sounds by rotating their pectoral fins. This sound is amplified by the swim bladder.
Difficult to sex when young, on mature animals over 30 cm long, the female has fuller abdomen and lighter fins. A paternal mouthbrooder; the fish spawn in the ocean, and the few very large eggs are incubated by the male. Then the male swims up in the coastal rivers to deposit the fry in freshwater rivers. There they remain during the early stages of life, before migrating back to coastal areas. As the fish grow, they become restless, and this behaviour may be related to their natural migratory instincts.
(African Freshwater Pipefish)
(Variegated platy )
(Glass bloodfish, Glass bloodfin)
(Rummy nose rasbora)
(Peacock cichlid, African peacock)
(Flower horn fish)
(Cuckoo Synodontis, Multi-spotted synodontis )
(Scat, Spotted scat)
(Even-spotted synodontis, False Cuckoo synodontis)
(Yellow Congo Tetra)
(Blue Victoria Mouthbrooder)
(Brichard's slender cichlid)
(One-spot Synodontis, Domino Syno)
(South Amrican Bumblebee Catfish)
(Barfin Synodontis, White-Barred Synodontis)