The fearless coral reef fish known as the fang blenny might only grow to several inches long, but it packs a toothy, venomous bite. New research into the fang blenny family tree reveals how their fangs and venom evolved – and hints at how these fish disable potential predators with a heroin-like, pain-killing venom.Read the whole story at the PLOS Ecology Blog: Fanged Coral Fish's Venomous Bite Could Lead to New Pain Treatments.