both dennerle and Geosesarma crab are popularly sold as pets . German researchers say they are both new species and come from Java . Traced crustaceans ' origins by reference to larvae of the colourful crab . researchers think more new species of Vampire crabs are still to be discovered .
Geosesarma dennerle and Geosesarma hagen are popularly sold as pets . German researchers say they are both new species and come from Java . Traced crustaceans ' origins by talking to dealers of the colourful crabs . Experts think more new species of Vampire crabs are still to be discovered .