Northern Cory

Corydoras septentrionalis is a moderately large cory from the northern river systems of Venezuela, including Llanos drainages that flow northward toward the Caribbean coast. It has a typical cory body form with a light tan to olive base colour adorned with fine dark spotting and a subtle lateral stripe. Its name means 'northern' in Latin, reflecting its geographical position within the genus's range.

The Llanos rivers of Venezuela undergo extreme seasonal variation — wet season flooding expands habitat enormously while the dry season concentrates fish into shrinking pools and streams. This boom-and-bust hydrology has given C. septentrionalis exceptional adaptability to varying water quality, hardness, and temperature. In the aquarium it is one of the more forgiving cory species, tolerating a wider range of parameters than most.

This species is infrequently exported but represents excellent value when found. It is easy to keep, peaceful, and long-lived with basic care. Groups of six or more will produce confident, active fish that spend much of the day foraging across the substrate.

Water: Soft to moderately hard, pH 6.0–7.8, temperature 22–28°C; one of the most parameter-tolerant cories available. Tank: 80 L with fine sand or smooth gravel, plant cover, and open foraging areas. Feeding: Sinking pellets, frozen bloodworm, Tubifex, and blanched vegetables; an eager, unselective feeder. Breeding: Typical cory spawning method; cool water change effective; robust species that may breed readily. Compatibility: Excellent community fish; tolerates harder and warmer water than many cories.