A family of freshwater fish native to South America, including piranhas and tetras, characterized by their small to medium size and often bright coloration.
From the genus 'Erythrinius' combined with the Latin taxonomic suffix '-idae' used to denote a family of organisms. The name references the red coloring found in some members.
Erythrinidae sounds scary because it includes piranhas, but most of these fish are actually colorful little community tank favorites—they're named for being red, but many wear jewel-tone blues and greens instead, showing how Latin names don't always match reality.
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