“Now there’s something you don’t see every day,” the Doctor said, standing in the open door of the TARDIS and pointing out into the blackness of space towards a moving pink blur. “It must be migration season in these parts.”
“What are they?” Standing just behind his shoulder, Martha peered past him, trying to make out details. The swarm, flock, herd or whatever was heading in their general direction although it looked like the creatures would pass to their left.
“Space turtles.” The Doctor beamed. “Lovely, aren’t they? Very pink.”
A herd of gigantic pink turtles, swimming through space.