Notropis atherinoides is a species of freshwater fish commonly referred to as the emerald shiner. This species is native to North America and is known for its bright green color. There are a few synonyms for Notropis atherinoides, including Hystelognathus atherinoides and Luxilus atherinoides. Additionally, the emerald shiner is often confused with other shiner species, including the spottail shiner and the mimic shiner, due to their similar appearances. Regardless of the synonyms or potential confusion with other species, the emerald shiner remains an important member of freshwater ecosystems and offers benefits as a baitfish for recreational fishing.