Emanuele Biggi / Freshwater Crab (Potamon fluviatile), young carried in their mother's telson pouch, Tuscany, Italy. August.

MYN / Gil Wizen / Bark scorpion (Tityus asthenes) telson and stinger, Jatun Sacha Biological Station, Napo province, Amazon basin, Ecuador. Meetyourneighbours.net project

MYN / Gil Wizen / Telson and sting of black fat-tailed scorpion (Androctonus bicolor), Central Coastal Plain, Israel, June. Focus stacked and cropped. meetyourneighbours.net project

Pete Oxford / Horseshoe Crab (Limulus polyphemus) male clinging to the telson of a larger female, Little St. Simon's Island, Georgia

John Cancalosi / Bark Scorpion {Centruroides exilicauda} close-up of telson (stinger) Arizona, USA.

Fred Bavendam / Horseshoe Crab (Limulus polyphemus) male clinging to the telson of a larger female, photographed by diver, Cape Anne, Massachusetts

Fred Bavendam / Horseshoe Crab (Limulus polyphemus) male clinging to the telson of a larger female, he will try to hold on until she goes ashore to lay her eggs, Cape Anne, Massachusetts

Fred Bavendam / Horseshoe Crab (Limulus polyphemus) male clinging to the telson of a larger female, he will try to hold on until she goes ashore to lay her eggs, Cape Anne, Massachusetts

John Cancalosi / Bark scorpion (Centruroides exilicauda), close-up of telson / stinger, Arizona, USA, July.