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Across 5. form a complex web of life in coastal waters; relatively fragile and sensitive to human activites 6. flat, compacted mud that are exposed between high and low tide levels, usually in shallow sound levels 8. a large natural stream of water flowing in a channel to the sea 9. portion of a stream that is affected by ebb and flow of ocean tides in the case that the subject stream discharges to an ocean, sea or strait 10. a type of marsh that is found along coasts and estuaries of which flooding characteristics are determined by the tidal movement of the adjacent estuary, sea or ocean 12. a place where a sea, river or other body of water is shallow 13. an expanse of sand or pebbles along a shore 14. the water found between a barrier island and the mainland

Down 1. a highly elevated are associated with marshes that contain hardwood trees 2. a long, narrow sandbank, especially at the mouth of a river 3. a wetland that is dominated by herbaceous rather than woody plant species 4. a semi-enclosed coastal body of water having connections with the open sea 7. an island separated from the mainland by a narrow body of water or by a shallow sea; often marshy area 11. an opening that connects the sound or lagoons with ocean water 12. a long, narrow accumulation of sand, with one end attached to the land, and other projecting at a narrow angle either into the sea or across a river estuary