Gobies with a GoPro

I've given my GoPro to the freshwater gobies. Their reaction surprised us all. They are way smarter than We think. They would make great videographers. The fish in this tank are: monkey goby (Neogobius fluviatilis), 2 toad gobies (Mesogobius batrachocephalus), 2 spined weather loaches (Cobitis taenia), 5 Amur bitterling (Rhodeus sericeus), fancy guppies, and one very blue Australian red claw crayfish (Cherax quadricarinatus). It started out as a Dniester Biotope tank, but lots of other animas found the