Amniotic fluid

Amniotic fluid is a liquid which "life comes from". There was some on Earth in the Atlantic. (TV: City of Death)

When Scaroth (a Jagaroth) tried to take off from the Atlantic, it broke and created a spark, reacting witht he fluid, creating life on Earth. (TV: City of Death)

The Moon also has amniotic fluid, because inside the moon, there was a creature inside it, waiting to hatch. (TV: Kill the Moon)