Ambiacus Cory

About

The spotted catfish (Corydoras ambiacus) is a small, social bottom-dweller from the upper Amazon basin, where it navigates the slow-moving, often oxygen-depleted waters of South America's lowland rivers and streams. Like all members of the Callichthyidae family, it wears bony plates rather than conventional scales, giving it that characteristic armored look Corydoras are known for. Coloration is famously variable. The classic form shows a straw or yellowish base covered in irregular brownish spots along the sides, a bold dark blotch at the front of the dorsal fin spilling onto the body, and hints of blue on the cheeks and caudal fin. Be aware that identification is genuinely tricky: this species' name gets misapplied to several lookalikes in the trade, and color pattern can shift between individuals and possibly between populations. One trait you'll notice quickly is the occasional dash to the surface to swallow air. This is completely normal. These fish have a specially adapted, vascularized section of intestine that extracts oxygen from atmospheric air, a handy backup when dissolved oxygen runs low. Keep them in groups of at least four to six; they're more active, more confident, and frankly more interesting to watch in numbers. One handling note worth passing on: those stiffened pectoral spines can pierce skin and deliver a genuinely painful sting, so use a soft net or a container when moving them.