🐟 Colombian Shark (Ariopsis seemanni)
Brackish–Marine Catfish • Fast-Swimming Schooling Species • Silver Shark Catfish • Active Predator-Scavenger
 
📋 The Colombian Shark (Ariopsis seemanni) is a striking silver-and-black brackish catfish known for its sleek body shape, schooling behavior, and high-speed swimming.
They require clean water with increasing salinity as they mature, transitioning from light brackish to near marine conditions in adulthood.
Despite their shark-like look, they are generally community friendly with similarly sized tankmates, but their active nature and rapid movement give them a strong open-water predatory presence.
As a rare brackish species in the hobby, they offer a dramatic display for larger brackish or marine transition systems.
 
💡 Highlights
✨ Silver Shark Appearance: Sleek, metallic body with black-edged fins
🌿 Brackish–Marine Transition: Needs increasing salt as it grows
⚪ Community Friendly (Large Species): Best with similar-sized fish
📏 Fast Schooling Catfish: Active open-water swimmer
💧 Clean Water Lover: Sensitive to ammonia & low oxygen