Oceans

3D ocean farming: creating food while cleaning the ocean 
Horseshoe crabs are drained for their blue blood. That practice will soon be over.
Green lights reduce bycatch in fishing nets by 63%
The return of sail power
What the ancient, alien jellyfish can tell us about the human brain
Magical coral spawning event gives reefs renewed hope
Underwater speakers draw fish to restore coral reefs
Robot penguins are exploring mysterious ocean currents