IDENTIFIED

Summary from the TLDR newsletter

A creature discovered off the coast of Okinawa, Japan in 2018 left biologists baffled as it wasn't like anything else they've seen before. The creature has now been determined to be a type of parasitic flatworm. It is made up of two forms of the parasite that cooperate together. This article tells the story of how scientists identified the creature. Pictures of the flatworm are available.