Spear-toting robot can guard coral reefs against invasive lionfish

Lionfish are threats to not only fragile coral reef ecosystems, but the divers who keep them in check. They not only take advantage of unsuspecting fish populations, but carry poisonous spines that make them challenging to catch. Student researcher... https://ift.tt/2BPUaxn Jon Fingas August 27, 2018 at 03:00AM