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Thousands of Bumblebee Catfish Migrate Up Waterfall in Brazil

8/27/2025

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Summary

Story summary

Thousands of bumblebee catfish (Rhyacoglanis paranesis) were seen migrating up a waterfall in southern Brazil.
The 3.5-inch fish were filmed by scientists after a tip from the Environmental Military Police in 2024.
Researchers believe this climbing behavior relates to reproductive activities prompted by the rainy season after a drought.
The study underscores the need for habitat conservation due to threats from river damming.

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Story summary

Thousands of bumblebee catfish (Rhyacoglanis paranesis) were seen migrating up a waterfall in southern Brazil.
The 3.5-inch fish were filmed by scientists after a tip from the Environmental Military Police in 2024.
Researchers believe this climbing behavior relates to reproductive activities prompted by the rainy season after a drought.
The study underscores the need for habitat conservation due to threats from river damming.