Additional information:Only obtainable during the Rakghoul event.
Once you use The Spike to gain access to the Rakghoul Tunnels, pick up the quest “[Daily] Collecting Raklings” (Empire) or “[Daily] Rounding Up Raklings” (Republic) from the daily terminal.
Once you have the quest, interact with one of the spore sacs and free a rakling to get the codex entry.
We would like to thank CommanderKeeva for additional information.
Original Game Codex TextIt has long been thought that the only way for the rakghoul virus to spread was by turning other beings into rakghouls through infection, but close studies of underground rakghoul habitats now point to a more complicated and unsettling reality: that rakghouls can propagate without the need for turning. Located deep below the surface of infected planets, small rakghouls have been found roaming together in packs. These “raklings” appear to have been formed from luminescent spore sacs strung along the rakghoul tunnels, though it is not yet clear to biologists how this process works. They have learned, however, that the raklings are attracted to a particular pheromone emitted from certain flora found within the tunnels. Researchers have long wished to use this pheromone to lure raklings into captivity, but strict antiviral protocols enacted by THORN do not allow these proto-rakghouls to be taken aboveground. Until they can be tested in a proper laboratory setting, the truth of how rakghouls self-multiply may not be fully understood.
Planet: Unknown Planet