🦈 Columbian Shark (Ariopsis seemanni)
Active Predator • Brackish-to-Marine Fish • Shark-Like Catfish
 
📋 The Columbian Shark (Ariopsis seemanni) is a brackish catfish often mistaken for a true shark due to its sleek silver body, forked tail, and constant cruising behavior. Juveniles are usually sold as freshwater fish, but for long-term success they must be gradually transitioned to brackish and eventually marine water.
Growing up to 35 cm (14"), these fish require large aquariums with powerful filtration. They are active predators, so they should not be housed with small fish that can fit into their mouths. Instead, they thrive in groups with other large brackish or marine species.
With their impressive shark-like swimming style and shimmering silver coloration, Columbian Sharks make a stunning display species for experienced aquarists.
 
💡 Highlights
✨ Shark-like swimming style – forked tail & sleek body
⚪ Brackish-to-marine species – requires salinity changes as it grows
📏 Can reach up to 14" – needs very large tanks
✅ Active schooling catfish – prefers groups for natural behavior
🐠 Predatory nature – best with large tankmates only