C. eigenmanni is found in freshwater environments in Central America in the Pacific and Atlantic drainages from Nicaragua to Panama. This species specifically lives close to the shoreline, river backwaters, and motionless region of habitats. They can be found near vegetation. They feed mainly on algae and sometimes on aquatic insects.
- Froese, Rainer and Pauly, Daniel, eds. (2011). "Carlana eigenmanni" in FishBase. October 2011 version.
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