They get high by the beach (5)
I believe the answer is:
tides
(Other definitions for tides that I've seen before include "Moon-driven ocean movements" , "Lunar ocean movements" , "Surges" , "Rises and falls, nautically" , "Those fluctuating" .)
I believe the answer is:
tides
(Other definitions for tides that I've seen before include "Moon-driven ocean movements" , "Lunar ocean movements" , "Surges" , "Rises and falls, nautically" , "Those fluctuating" .)