New Amazon killifish species discovered in Brazil may already face extinction

Scientists have discovered a new species of tiny orange-patterned killifish, Laimosemion laranja, in the Brazilian Amazon, but its survival may already be threatened. Found in only three small forest pools, its limited habitat faces risks from mining, deforestation, pollution, and development. The fish, measuring less than three centimeters, was identified during fieldwork in the Rio Cajari drainage in Amapá state. Researchers confirmed its distinct identity through physical analysis and mitochondrial DNA testing, with males displaying bright orange spots and chevron patterns. The species' entire known range covers just 25 square kilometers, leading researchers to recommend it for Endangered classification under IUCN guidelines. They have proposed expanding the Rio Cajari Extractive Reserve to protect the habitat, highlighting the need for conservation in poorly explored Amazonian areas.