We all know takeout food sometimes requires special utensils to be eaten properly. The same is true for fish. (The food they’re eating, not takeout fish.) Below, behold the first video of a reef fish using a tool — and traveling a great distance to find it.
The orange-dotted tuskfish, a species of wrasse, is the second type of wrasse documented using tools in the past few months. A blackspot tuskfish was caught on camera earlier this year; now the first video has been published.
A researcher in New York is building fish robots that infiltrate schools of fish and take them over. The cyberfish could be used to lead fish away from unsafe underwater turbines or other hazards. The same mathematical models that drive them could conceivably be used to lure birds to new wintering grounds or even to herd mammals, the researchers say.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.