When their biological clocks sound the alarm, horseshoe crabs, sea turtles, and small fish called grunions ride the surf to the shore. There they lay their eggs to incubate in the softness of the sand.
Nii odasabalised, merikilpkonnad kui ka väikesed kalad grunjoonid, kes alluvad oma bioloogilisele kellale, lasevad lainetel kanda end rannaliivale, kuhu nad munevad oma munad või kaevavad marja.