I really don't know what this is lol found it on the beach of Monterey Bay space or click for next one person thought it was driftwood, one person thought it was dried clay, and another person thought it was sedimentary rock.... dunno who to believe :\ there's a bunch of weird markings on the front and left side that look like fingernail marks... ? edit 3/7/24: why do yall keep saying this is foam??? oh, wait, I can kinda see it now...