I am currently exploring the sonification of weakly electric fish, such as the Black Ghost Knifefish, partially cos it's fun (see ENKI, by Tony Hall). but there is examples of using the frequency analysis to monitor water quality
Fish 2 pd Interface
First Sonification experiment
Please note that the clicks are not communication, but wiggles in the wiring... see chrips in the pic above, detected with pd.
Literature on Biomonitoring using weakly electric fish
Real-time biomonitoring of water contamination by cyanide based on analysis of the continuous electric signal emitted by a tropical fish: Apteronotus albifrons