Skarasen

The Skarasens are large reptilian creatures which resemble dinosaurs.

The Skarasens are massive, large enough to crush a human with one clawed foot, which are cybernetically altered to suit the Zygons' purposes. It had vulnerability to no force short of a nuclear weapon.

Originally from the Zygon homeworld. the Zygons transported the Skarasen to Earth in their ship with them as an embryo and cybernetically enhanced it as a weapon and see through its eyes via monitor screens. The Zygons also fed off its lactic fluid.

The Skarasen attacked any persons or objects to which the Zygons attached a transceiver which broadcast an ultrasonic mating call to the Skarasen. The Skarasen's presence in Loch Ness hadhelped to inspire the local legends of the Loch Ness Monster.


 * The Borad also seemd to have helped to inspire this legend.

Following the Doctor, who had the homing device in his pocket, the Skarasen traveled from Loch Ness to London via the Thames to follow him. The Doctor threw the homing device after for the Skarasen to fetch. Its subsequent fate remains unknown, though with the death of the Zygons on Earth it woudld have no one left to control it. (DW: Terror of the Zygons)

The Doctor obliquely mentioned the Skarasen's appearance in London as an example of alien intervention that human's preferred to forget or ignore (DW: Remembrance of the Daleks).

Decades later, when Sarah Jane Smith and Rose Tyler vied to outdo each with the monsters they had seen while with the Doctor, Sarah ultimately managed to impress Rose by her statement that she had met the Loch Ness Monster. (DW: School Reunion)