Low tides combined with heavy surf can uproot burrowing sea cucumbers, leaving them stranded on the beach, sometimes by the thousands!
Lacking tube feet, these strange animals look more like a worm than a sea cucumber.
They live just past the surf and as their name suggests, they burrow into the sand for protection. Most of the time they are just fine, nestled down in the sand, but certain ocean conditions, such as heavy surf combined with low tides can dislodge them leaving them stranded along the shoreline, sometimes by the thousands.