Peruvian Whiptail Catfish
Rineloricaria morrowi
A slender Peruvian whiptail catfish that rewards patient keepers with fascinating paternal care.

About
Found in the Ucayali River basin of Peru, this whiptail loricariid, Rineloricaria morrowi, is one of those species you have to seek out a little. It doesn't turn up in shops as readily as some of its relatives, and you may still encounter it labeled under the briefly-used synonym Hemiloricaria morrowi. Like other members of the genus, it has the classic flattened, elongated body profile and armored plating that make loricariids so recognizable, built for hugging the bottom in flowing Amazonian waters. Despite the temperament tags you sometimes see attached to it, this is actually a quite peaceable fish outside of spawning season, doing well in communities of calm, similarly-sized species. It does become territorial around breeding time, and males guard eggs with real dedication. Cleaning a chosen cave, fertilizing the clutch, and fanning the eggs until they hatch, all without any help from the female. That paternal behavior makes it genuinely interesting to breed, though raising the fry takes some patience and attention to feeding and water quality. Keep it in a group rather than as a singleton, avoid boisterous tankmates that will push it off food, and provide plenty of cover. The genus is also capable of facultative air-breathing, a handy adaptation for life in seasonally variable Peruvian waters.
Similar species
Other fish you might consider
Good tank mates
Species that tend to coexist peacefully with Peruvian Whiptail Catfish
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Peruvian Whiptail Catfish get?
- The Peruvian Whiptail Catfish reaches about 4–6.5" as an adult.
- What size tank does the Peruvian Whiptail Catfish need?
- A minimum of 21 gallons is recommended for the Peruvian Whiptail Catfish.
- What water parameters does the Peruvian Whiptail Catfish need?
- The Peruvian Whiptail Catfish does best with a temperature of 68–80°F, a pH of 6–7.5, hardness around 2–15 dGH.
- Is the Peruvian Whiptail Catfish aggressive?
- The Peruvian Whiptail Catfish is aggressive and is best kept alone or with robust tankmates that can hold their own.
- What does the Peruvian Whiptail Catfish eat?
- The Peruvian Whiptail Catfish is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.