Flotation; Turtles' Lungs Are Thought to Aid It
This page is the CodyCross answer for the clue below from Tundra and Taiga, Group 1699, Puzzle 5 (Altai Mountains).
Question is: Flotation; Turtles' Lungs Are Thought to Aid It
and the answer is: BUOYANCY
Word Meaning:
BUOYANCY — (physics) The upward force on a body immersed or partly immersed in a fluid.
Definitions from Wiktionary.