Seafaring stowaways Dumped by Careless bilge pumps Once foreign, home Quiet freshwater invasion Clams now refugees Tiniest zebras Roaming submerged plains OCD to clean – and glue Small, razor sharp Shell seeds White putty insides Sifting creepers Scour water Green to clear Herons-adored A traveler’s banquet Easy pickins Reside underside Driftwood hide Washed-up skeletons…