Pseudoplatystoma magdaleniatum

Pseudoplatystoma magdaleniatum, commonly known as the Magdalena tiger catfish or striped catfish, is a large freshwater fish endemic to the Magdalena River basin in Colombia. This impressive catfish can reach lengths of up to 1.5 meters and weights exceeding 50 kilograms, making it one of the largest freshwater fish species in South America. The species displays distinctive dark vertical stripes across its silvery-gray body, with a flattened head and prominent barbels that help it navigate the murky river waters.

As a bottom-dwelling predator, it primarily feeds on smaller fish, crustaceans, and aquatic invertebrates found along the riverbed and in deeper pools. The Magdalena tiger catfish inhabits the main channels and tributaries of the Magdalena River system, preferring areas with moderate to strong currents and rocky or sandy substrates. This species undertakes significant migrations for spawning, traveling hundreds of kilometers between feeding and breeding areas.

The International Union for Conservation of Nature classifies Pseudoplatystoma magdaleniatum as Endangered due to severe population declines over recent decades. Historical accounts suggest this catfish was once abundant throughout the Magdalena basin, supporting important commercial and subsistence fisheries. Encouragingly, recent conservation initiatives have established fishing quotas and seasonal closures during critical spawning periods, while several Colombian research institutions are developing captive breeding programs to support population recovery efforts.

This species inhabits the main channels and major tributaries of the Magdalena River basin in Colombia, preferring deep pools and areas with moderate to strong currents. It typically occupies rocky or sandy bottom substrates in both lowland and mid-elevation river sections, requiring clear migration corridors between feeding and spawning areas.