Over the past decade, humans have introduced two species of Indo-Pacific lionfish ( Pterois volitans and Pterois miles ) into the Atlantic Ocean. These fishes have been seen in a wide range of Atlantic marine habitats, including coral reefs, hard bottoms, seagrass meadows, mangroves, and oyster reefs. Sightings in different habitats mean that Indo-Pacific lionfish are found across a wide area, making it difficult to track their expanding numbers. In this research, the scientists wanted to compar Topics: Citizen Science, Water, Wildlife, Crowdsourcing, Data Collection, Invasive Species, Lionfish, Marine Conservation.