Beachcombing is an activity that consists of an individual "combing" (or searching) the beach and the intertidal zone, looking for things of value, interest or utility. A beachcomber is a person who partakes in the activity of beachcombing.
Despite these general definitions, beachcombing and beachcomber are words with multiple, but related, meanings that have evolved over time.
Historical usage 
The first appearance of the word "beachcombers" in print was in Herman Melville's Omoo (1847). It described a population of Europeans who lived in South Pacific islands, "combing" the beach and nearby water for flotsam, jetsam, or anything else they could use or trade. When a beachcomber became totally dependent upon coastal fishing for his sustenance, or abandoned his original culture and set of values, then the term "beachcomber" was synonymous with a criminal, a drifter, or a bum. The vast majority of beachcombers however, were simply unemployed sailors like Herman Melville in Typee, or Harry Franck in the book Vagabonding Around the World.
After enduring a voyage of danger and hardship, it was not uncommon for a few whalemen to desert a ship when it arrived in Tahiti or the Marquesas and reside, at least for a while, in the South Sea islands of Polynesia. If another beachcomber was ready to take his place in order to get home, the captain might let the disgruntled crewman go; otherwise, the captain would offer the natives a reward to find and return the deserter, and deduct the reward, plus interest, from the deserter's pay.
In other words, the deserter, if caught, would end up working the entire voyage for no pay at all, or even return home in debt to his employers. In Typee, Melville deserted, not once but twice, before signing on as a crewman on a Navy frigate, without fear of repercussions.
Some beachcombers traded between local tribes, and between tribes and visiting ships. Some lived on the rewards for deserters, or found replacement crewmen either through persuasion or through shanghaiing. Many, such as David Whippy, also served as mediators between hostile native tribes as well as between natives and visiting ships. Whippy deserted his ship in 1820 and lived among the cannibal Fijis for the rest of his life. The Fijis would sometimes capture the crew of a stranded ship for ransom, and eat them if they resisted. Whippy would try to rescue them but sometimes found only roasted bones. Ultimately he became British Consul to Fiji, and left many descendants among the islands.
There had always been a small number of castaways in the South Pacific since the earliest Spanish explorers, but the numbers increased dramatically in the early 19th century as the pre-requisite for a beachcombing in the Pacific was the era of whaling which began about 1819. It is estimated that 75% of beachcombers were sailors, particularly whalemen, who had jumped ship. They were predominantly British but with an increasing number of Americans, particularly in Hawaii and the Carolines. Perhaps 20% were English convicts who had been transported to Australia and escaped from the penal colonies there.
It is estimated that in 1850 there were over 2,000 beachcombers throughout Polynesia and Micronesia. The Polynesia and Melanesia communities were usually receptive to beachcombers and castaways who were absorbed into the local community, usually by formal adoption or by marriage, with the beachcombers and castaways often being considered a status symbol of the local chief. The social and commercial role of beachcombers ended when missionaries arrived and with the growth of a commercial community with European (palagi) traders, resident on each island, that were the representative of trading companies. Many beachcombers made the transition to become island traders.
Other languages 
In Uruguay, the term has been naturalized into the Spanish form Bichicome, and refers to poor or lower-class people. The Spanish form also draws on the similarities to the Spanish bicho (small animal/insect) and comer (eat), Similarly, the term has entered the Greek slang through sailors, the word "pitsikómis" (πιτσικόμης).
In archaeology the beachcombing lifestyle is associated with coastal shell-middens that sometimes accumulate over many hundreds if not thousands of years. Evidence at Klasies River Caves in South Africa, and Gulf of Zula in Eritrea, show that a beachcombing option is one of the earliest activities separating anatomically modern human homo sapiens from the ancestral subspecies of Homo erectus.
Modern usage 
Many modern beachcombers follow the "drift lines" or "tide lines" on the beach and are interested in the (mostly natural) objects that the sea casts up. For these people, "beachcombing" is the recreational activity of looking for and finding various curiosities that have washed in with the tide: seashells of every kind, fossils, pottery shards, historical artifacts, sea beans (drift seeds), sea glass (beach glass) and driftwood. Items such as lumber, plastics, and all manner of things that have been lost or discarded by seagoing vessels will be collected by some beachcombers, as long as the items are either decorative or useful in some way to the collector. (However, this usually does not include the great bulk of marine debris, most of which is neither useful nor decorative.)
Today, many people beachcomb for beach treasures and also because the activity offers them a natural prescription to achieve better emotional, physical and spiritual health.
Sophisticated recreational beachcombers use knowledge of how storms, geography, ocean currents, and seasonal events determine the arrival and exposure of rare finds. They also practice eco-conservation and do not kill mollusks for their shells, dig holes in the sand, or gouge cliff faces for fossils or reefs for coral specimens. Many beachcombers serve as excellent stewards of the seashore, working with government agencies to monitor shore erosion, dumping and pollution, and reef and cliff damage, etc.
Recognized beachcomb experts today include oceanographer Curtis Ebbesmeyer (Flotsametrics and the Floating World); eco-educator Dr. Deacon Ritterbush (A Beachcomber’s Odyssey); sea glass experts Richard LaMotte (Pure Sea Glass) and C.S. Lambert (Sea Glass Chronicles); geologist Margaret Carruthers (Beach Stones); shell specialists Chuck and Debbie Robinson (The Art of Shelling), and zoologist Dr. Blair Witherington and Dawn Witherington, (Florida's Living Beaches: A Guide for the Curious Beachcomber).
In films and television 
Both the recreational and utilitarian aspects of beachcombing or “wrecking” were celebrated in the film The Wrecking Season, an award-winning film that portrays playwright Nick Darke’s passion for beachcombing on the coast of Cornwall, UK.
See also 
- H.E. Maude, Of Islands and Men (1968), 135.
- ABC Whipple, Yankee Whalers in the South Seas, Doubleday, New York, p 150
- Ruth Blair (1996), Typee, (Oxford World's Classics). Introduction xv.
- David Whippy's long journey home (retrieved Apr 22, 2012)
- ABC Whipple, Yankee Whalers in the South Pacific, Doubleday, New York, p 151
- H. E. Maude, Beachcombers and castaways, The Journal of the Polynesian Society 73: 3 (1964) 254–293
- K.R.Howe, Where the Waves Fall: A New South Sea Islands History from First Settlement to Colonial Ruler (1984), 103.
- Early human use of marine resources and pigment in South Africa during the Middle Pleistocene Nature 449, 905-908 (18 October 2007) (retrieved Nov 17, 2009)
- Early human occupation of the Red Sea coast of Eritrea during the last interglacial Nature 405, 65-69 (4 May 2000) (retrieved Nov 17, 2009)
- S. Deacon Ritterbush, A Beachcomber's Odyssey, Vol. I: Treasures from a Collected Past, Ritz Dotter Publishers (2008), 93
- Richard LaMotte, Pure Sea Glass, Sea Glass Publishing (2004), 20
- Chuck and Debbie Robinson, The Art of Shelling Old Squan Village Publishing (1995) 22-23
- S. Deacon Ritterbush, A Beachcomber's Odyssey, Vol. I: Treasures from a Collected Past, Ritz Dotter Publishers (2008), 115