“…The presence of non‐native fish is due to the fact that the middle part of the Amacuzac river receives discharges from four tributaries that cross important urban, industrial, and agricultural districts as well as an extensive network of ornamental fish farms (Ortega et al., 2009; Ramírez et al., 2010). The improper handling and the escape of fish into adjacent rivers have drastically changed the fish fauna over the last 100 years (Jordan & Snyder, 1899; Miller, 1986), altering the local aquatic trophic chain (Mejía‐Mojica et al., 2012, 2015). Invasions represent one of the most pervasive aquatic habitat transformations, and a central issue in biodiversity conservation around the world (Rajeev et al., 2008; Simberloff, 2010), as invasive species can lead to a loss of native biodiversity and the homogenization of aquatic systems (Olden et al., 2016).…”