background brown coarse granite gravel gray nature path pebble pebbles red road rock sand sand texture texture wallpaper beach drifts dunes ocean Sand Ripples travel vacation complex curves pattern rill ripple sculpted wet animals aquatic claw claws crab crab texture India krayker pattern crab pincher sands sea seafood aged appearance beach sand driftwood grooves holes old patterns rough seashore shore textures timber wood worm-eaten clam conch food grain of sand mussel ochre oyster print seashell shell structure Dirt dirty metal metallic panel panels rust rusty sanded spoil spoiled steel Ensis siliqua ozean razor clam abstract