What are these perfect sets of beach holes? Flip flop for scale.

Image from preview.redd.it and submitted by papa_higgins
image showing What are these perfect sets of beach holes? Flip flop for scale.

ardvarkmadman on July 15th, 2019 at 04:52 UTC »

I suspect someone was digging clams

guruofsnot on July 15th, 2019 at 04:53 UTC »

Is that geoduck habitat?

papa_higgins on July 15th, 2019 at 05:39 UTC »

Solved!

Y’all clam commenters were right. That was the remnants of a scientific clam survey like this one.