Dolphins and 
                porpoises, for example, are often seen anywhere from tidal creeks to 
                open ocean, fins breaking the surface in groups as they search for 
                fish, or jumping in speedy solos ahead of bow waves pushed by 
                passing boats. 
            
            From a distance, 
            it's hard to tell a dolphin from a porpoise - both are air-breathing 
            mammals with long, gray bodies, round heads, fins, flippers and 
            flukes that project sound waves underwater to get their bearings. 
            Some dolphins have a protruding beak, and thus the name 
            "bottlenose", but the only consistent difference is that porpoises 
            have bigger teeth.       
            
             One behavior 
            common to both is called "tailing" - seemingly standing on their 
            heads in shallow water, thrashing tail flukes while digging in muddy 
            bottoms for fish. Another is known as "stranding" -  swimming at 
            great speed out of the water on to dry land, pushing a wall of water 
            and fish in front, before eating the fish and wiggling back into the 
            surf.   
            
             Another  frequent 
            visitor is the manatee - a bigger, slow-moving mammal that resembles 
            a giant baked potato with flippers. Also known as sea cows, manatees 
            come in from offshore to lap up fresh water and  graze on aquatic 
            plants that grow easily in Charleston's warm climate, and have often 
            been hand-fed along area docks by folks with a garden hose and a 
            head of lettuce. 
            
            Just 
            offshore, Charleston is surrounded by an abundance of reefs that 
            brim with bright coral and creatures. Most are man-made, the result 
            of old 
            shipwrecks, but in recent years, a state program has intentionally 
            sunk everything from concrete bridges to obsolete U.S. Army tanks to 
            extend the reef environment. 
            
            Sinking 
            environmentally-safe steel and concrete in select offshore areas 
            around Charleston has turned 20 square miles of lifeless sand into 
            what's known as  "live bottom", where sponges, corals and other 
            inverterbrates attach to hard surfaces and begin the food-chain that 
            attracts swarms of fish. 
            
            At depths ranging 
            from 20 to 110 feet, visibility is much clearer, and reef divers 
            find octopus, barracuda, anemones and sailfish among the diverse 
            underwater population. Anywhere there's real activity below the 
            surface, there's reel activity above it, and offshore reef-fishing 
            near Charleston is very popular throughout the year. Changing water 
            temperatures attract an ever-revolving menu of cobia, amberjack, 
            sheepshead, tuna, sea trout, grouper, mackerel, spadefish, pompano 
            and shark.
            
            Back inshore, some 
            of the catching techniques haven't changed much since ancient times, 
            and along extensive estuaries to the north an south of the city, 
            flooded mud flats and marsh grasses spawn shrimp, mollusks, crabs 
            and fish that are caught by nets, hooks, spears, hands, shovels, 
            hammers, tongs, and traps, while some sea creatures have been known 
            to jump in the boat by themselves.
            
            Flyfishing for red 
            drum from flat boats pushed into shallow bays with poles is 
            tremendously popular with locals, as is recreational shrimp-baiting, 
            in which newly-mature white shrimp emerging from marshes in the Fall 
            are caught in cast nets.
            
            People in the 
            Charleston area still "scratch" for clams in mud at low tide, 
            looking for a small opening, or "key hole", that indicates where the 
            clam has burrowed before digging after it. The stone crab's powerful 
            claw is a delicacy that takes some nerve to retrieve. They burrow in 
            holes beneath oyster beds, where catching requires  reaching in 
            with bare hand to scoop the critter out without losing a finger or 
            two of your own. Because the creature's claws will regenerate, the accepted practice 
            is to take one off and throw the crab back.
 
            Because the creature's claws will regenerate, the accepted practice 
            is to take one off and throw the crab back.  
            
            
            Oyster roasts are 
            a long-standing Charleston tradition that usually feature clusters 
            gathered from mud banks at low tide, where harvesters often plod in 
            with hammers to dislodge masses of shells.
            
            Another old 
            favorite is "gigging" or "graining" for flounder at night with 
            bright lights and long spears in shallow water. The lights attract 
            the fish, which although well-camouflaged by changing pigments in 
            their scales, are spotted by a well-trained eye, impaled and hauled 
            in.
            
            The most 
            memorable and visual marine harvesting method around Charleston is 
            that of the shrimp trawler, and the local fleet high-bowed, 
            flat-bottomed boats topped with wing-like outriggers has been a 
            fixture along the docks of 
            Shem Creek since the 1920's.
            
            The typical 
            trawler day begins about 4 a.m., as diesels are fired up and boats 
            move off into the darkness while crews gobble fried eggs, grits and 
            bacon in the cramped galleys. By daybreak, the trawlers are a few 
            miles offshore, swinging outriggers to each side and lowering huge 
            nets behind them for a trawl or drag.
            
            Keeping nets 
            spread is critical, and is done horizontally by lowering flat, 
            wooden "doors" inside the outer edges on either side, as the 
            buffeting force of water holding nets open. Vertically, a bouyant  
            "float line" keeps the upper side of the net on the surface, while a 
            weighted "foot rope" drags the lower end across the bottom, kicking 
            marine life up into the net.
            
            A typical trawl 
            must be pulled in a straight line at about 3-4 knots, just fast 
            enough to trap sea life, but slow enough to hold the net's shape. 
            Because there's no way of seeing what's going on below the surface, 
            a smaller "try net" is dragged and pulled in from time to time to 
            make sure shrimp are there.
            
            Depending on the 
            trawler captain's instinct as to when the catch is full, nets are 
            winched in and dumped on deck. A good trawl will yield hundreds of 
            pounds of shrimp and "by-catch" - fish and crabs too large to escape 
            through the mesh of the net.
 hundreds of 
            pounds of shrimp and "by-catch" - fish and crabs too large to escape 
            through the mesh of the net.
            
            Everything 
            marketable is packed in ice, the rest is swept over the side, and 
            the trawl begins all over again. It's a familiar sight from Charleston 
            beaches as the trawlers rock slowly by, joined by hordes of sea 
            gulls overhead and pods of dolphins and porpoises behind, all 
            looking for a free meal.
            
             In fact, when a 
            shrimp trawler returns to Shem Creek, the success of the day can be 
            measured as easily by the weight of shrimp on board as  by the wake 
            of creatures that follow right up to the docks. 
            
            Getting on the 
            water is a cherished Charleston treat as well, and it's available 
            under power, under sail or by paddle.  Harbor tours, dinner cruises 
            and tours to historic Fort Sumter are featured on SpiritLine 
            Cruises, whose flagship, The Spirit of Carolina, seats up to 
            400 passengers on three viewing decks that include dining areas and 
            bar. Private charters are also available, and for tour times and 
            information, call 843-881-7337 or 1-800-789-3678. For a taste of the 
            tall-masted sailing vessel, The Schooner Pride offers tours 
            and charters aboard a classic 84-foot top-sail rigger. Harbor tours 
            and romantic sunset cruises offer passengers a chance to lap up the 
            brisk sea breezes and take in the marvelous sights of historic 
            Charleston Harbor and passing seagulls and dolphins. For 
            reservations and information call 1-800-979-3370.
            
            For those who 
            would prefer to explore the many charming creeks and waterways in a 
            more intimate fashion, paddling adventures by canoe and kayak are 
            offered in guided tours as well as rentals. Nature Adventures 
            Outfitters features guided tours of wetland areas by experienced 
            naturalists, taking in the unique diversity of barrier island 
            habitat, blackwater swamps and salt marsh estuary that surrounds 
            Charleston. For information, call 1-800-673-0679 or e-mail 
            natureadventuresoutfitters@worldnet.attnet.