Colombian Shark Catfish ( Hexanematichthys Seemanni )

Hexanematichthys seemanni, also known as the Columbian Shark Catfish or Tete Sea Catfish, is a sleek, silver-gray species recognized for its shark-like appearance and graceful swimming style. Native to Central and South American coastal rivers and estuaries, it’s an anadromous species—meaning it migrates between freshwater and brackish or even marine environments as it matures. In aquariums, it requires brackish water as an adult, excellent filtration, and plenty of swimming space. Its peaceful yet active nature makes it a fascinating display fish for large, well-maintained setups.