1Department of Aquatic Ecology and Systematics, El Colegio de la Frontera Sur, Chetumal, Quintana Roo, Mexico 2Department of Observation and Study of the Land, the Atmosphere and the Ocean, El Colegio de la Frontera Sur, Chetumal, Quintana Roo, Mexico DOI 10.7717/peerj.16285 Academic Editor D Ross Robertson Subject Areas Aquaculture, Fisheries and Fish Science, Biodiversity, Molecular Biology, Zoology, Freshwater Biology Keywords Freshwater, Fish larvae, Diversity, Epicontinental fishes,...