# Pimelodus grosskopfii (Pimelodus grosskopfii)

- Web page: https://www.funwildfacts.com/sydamerika/fish/pimelodus-grosskopfii
- Published: 2026-05-30
- Last updated: 2026-05-30

## Overview

Pimelodus grosskopfii is a medium-sized freshwater catfish inhabiting South American river systems. This fascinating fish belongs to the family Pimelodidae, a large group of American catfishes characterized by their long barbels and scaleless, smooth-skinned bodies. Pimelodus grosskopfii has a robust body with a broad, flattened head and three pairs of sensitive barbels that help the fish navigate in murky waters and locate food in darkness.

This species occurs primarily in the Paraguay-Paraná river system in southern South America, where it inhabits both main rivers and tributaries with varying water currents. The fish has a characteristic grayish-brown to dark gray coloration on the back that gradually transitions to a lighter belly. The dorsal fin has a strong spine, and the pectoral fins are equipped with powerful spines that can be dangerous to handle. These spines can cause painful stings and serve as defense against predators.

Pimelodus grosskopfii is an opportunistic omnivore that feeds on a wide spectrum of food items. During the night, the fish becomes active and searches for small fish, invertebrates, insect larvae, and plant material along the river bottom. With its sensitive barbels, it can locate prey even in total darkness or very turbid water. These barbels are covered with taste buds that function as a combination of tongue and nose.

The species has some importance for local fishing in certain parts of its range, but is not considered a commercially important species. In the aquarium hobby, it is occasionally kept, but requires large tanks due to its size and active nature. Pimelodus grosskopfii plays an important role in its ecosystem as both predator and prey, contributing to maintaining balance in the complex river systems where it lives.

## Quick facts

- Weight: 0.15–0.8 kg
- Length: 15–30 cm
- Lifespan: 5–10 yrs
- Diet: Omnivore
- Conservation Status: Least Concern

## Habitat

Pimelodus grosskopfii inhabits a varied spectrum of freshwater habitats in the Paraguay-Paraná river system in South America. The species prefers medium to slow-flowing waters with sandy or muddy bottoms where it can search for food. During the day, the fish often hides among overhanging vegetation, submerged wood, or in underwater caves along riverbanks.

During the flood season, populations spread out into flooded forests and wetlands where they exploit the abundant food supply. The water in these habitats is often turbid and contains much organic material, which suits the species perfectly since it relies more on its chemical senses than vision. Water temperature in these tropical and subtropical waters typically varies between 22-28°C, and the fish has adapted well to seasonal fluctuations in water temperature, water levels, and current velocity.

- River
- Lake
- Wetland

## Seasonal Behavior

Pimelodus grosskopfii follows seasonal patterns governed by rainy and dry periods in South America. During the rainy season, when water levels rise and river systems expand, the fish spreads out into flooded areas to take advantage of the increased food supply. This is also the primary spawning period when the fish reproduces in shallow, vegetation-rich water. During the dry season, populations retreat to main rivers and deeper pools where they concentrate in smaller areas. Activity remains primarily nocturnal year-round, but foraging can intensify during certain periods depending on food availability and water conditions.

## Breeding

- Offspring: 500–3000 

## Behavior & Ecology

- Activity Pattern: Nocturnal
- Social Behavior: Pimelodus grosskopfii is primarily a solitary fish that hunts on its own during the night. During the day, however, several individuals may gather in the same hiding place, especially when suitable resting sites are limited.
- Population: Population status is not fully documented, but the species is considered relatively common within its natural range.

## Did you know?

- Pimelodus grosskopfii has six barbels around its mouth that function as super-sensitive tools for feeling and tasting the environment!
- The fish can produce sounds by rubbing its pectoral fin spines against grooves in the shoulder girdle – a way to communicate with other fish!
- Despite lacking scales, the skin is covered with mucus that protects against parasites and bacteria.
- The catfish can eat almost half its own body weight in one night when food is abundant!
- The dorsal and pectoral fin spines can lock in an extended position, making the fish very difficult for predators to swallow.
- The species can survive in water with low oxygen levels by temporarily breathing air at the surface.
- During spawning season, females can produce thousands of small eggs that are scattered freely in the water.
- Pimelodus grosskopfii can grow over 30 centimeters long, making it one of the larger species in its genus!

## Taxonomy

- Kingdom: Animalia
- Class: Actinopterygii
- Order: Siluriformes
- Family: Pimelodidae
- Species: Pimelodus grosskopfii

## Image

- URL: https://images.djurfakta.com/animals/pimelodus-grosskopfii/1778242156640-1.jpg
- Photo: Ictiologia Universidad Católica de Oriente
- License: CC BY 2.0

## Other languages

- sv: https://www.djurfakta.com/sydamerika/fish/pimelodus-grosskopfii
- da: https://www.dyrefakta.com/da/sydamerika/fish/pimelodus-grosskopfii
- no: https://www.dyrefakta.com/sydamerika/fish/pimelodus-grosskopfii