Amy and I had a great time at Bio Bay.
Single cell planktin emit light when anything brushes up against them. We could see little trails of fishes swimming around. We kayaked thru a narrow channel thru a mangrove forest complete with iguanas in the pitch black. My canoeing skills paid off as we had to escape deadly city slickers who were hung up in the mangroves.
We used "Kayaking Puerto Rico" outfit, they were great.
