Think in drainages
Fish ranges follow connected waters, geological history, barriers and introductions—not political borders alone. A watershed-scale record is often more informative than a city name.
Reservoir stocking and movement through connected canals can put familiar species in unexpected places. Consult current local records before ruling a species in or out.
Do not expose sensitive sites
Location helps an identification but public precision is not always appropriate. Obscure coordinates for vulnerable species, small populations and spawning aggregations.
Retain the precise record privately when it has legitimate scientific or management value, and share it with the relevant authority through an appropriate channel.