Uploaded January 2026 | Updated September 2026, 1 week ago

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Aquatics expert Tom Sarac provides an in-depth overview of the Costae tetra! Native to slower-moving areas of the São Francisco and Itapicuru river basins in eastern Brazil, these fish are active, peaceful and very attractive. A social species, they're best kept in groups of at least 10, although larger numbers will showcase their shoaling behaviors more prominently. Watch the video to learn more about Costae tetras and to see if they're right for your aquarium!

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0:00 - Introduction to the Costae tetra
0:36 - Behavior, appearance, tank size and setup
2:39 - Water conditions
3:10 - Feeding
4:05 - Conclusion