For the first time, scientists have used high-definition underwater cameras to identify a new species. The small gelatinous blob known as Duobrachium sparksae is a type of ctenophore, or comb jelly. Scientists from the US-based National Oceanic and Atmospheric Administration (NOAA) discovered the creature in an underwater canyon north-west of Puerto Rico in April 2015 but it has only now been described in a research paper