Walking past this hole in a field near a beach the other day, I was reminded of this :
Which hides in holes in the sandy soil like the one above.
When I was a kid, it was all the rave to pick up the dukduk and say "dukdukdukdukdukdukdukduk" into it as close as you could get your lips to it. Sometimes the crab would come out and tickle your lips with its legs.
This is a Chamorro word that should be pronounced with Chamorro vowels; as in dook dook, not duck duck.