I used to harvest shellfish for a job, and we used pressurized water to help dig down. There's a whole lot of dead beach and low tide thst I blasted myself with, but there'd be some big ol honking horseclams 3 feet under the sand that closed off and died down there a long time before my hose found the cavity of its putrefied liquified remains.

Having that propelled in a blast along with sand and seaweed was s fun time.