I did, a long time ago. The AUV I showed off during Shenzhen was more generally to monitor water quality, but the ultimate goal was to detect chlorophyll a over a large area, which is a proxy for the amount of algae present.
This project ultimately got shelved due to lack of a testing/proving area, ideally a convenient small freshwater lake. The AUV was very low cost, so restarting the project does not require much/any direct funding. The testing area remains key. If anyone is interested in taking this on, I’d be glad to provide more details.