Research Specimen Theta

This large predator was kept in the main aquarium of the Disease Research Facility for a long period of time for testing purposes. The skeleton is very odd in appearance, having a solid exterior shell, as well as an interior skeleton. The PDA notes shared skeletal traits with the Biter and Sand Shark, implying distant relation between the three species. It is assumed that this species died off around 1000 years ago due to Kharaa.

This specimen is distantly related to four species still living on the planet today; the PDA notes shared skeletal traits with the Biter and Sand Shark, by extension this also makes Research Specimen Theta a relative of the Blighter and a very distant relative of the Rockgrub.