Keeping Aveiro's Moliceiro Boats and Heritage Afloat in Portuguese Waters
- @ Cynthia Adina Kirkwood
- 2 days ago
- 5 min read
Updated: 7 hours ago
"My grandfather, my father and my uncle were moliceiros. My son's passion is to have a moliceiro boat. My son started to ride with me in the regattas when he was very young. This boat is for him so that he too can participate in the regattas. With the help of master José Rito, I built my first moliceiro to fulfill my childhood dream. That's why my moliceiro was called Um Sonho (A Dream)," said José Rebelo.
The flat-bottomed pine moliceiros of Aveiro are a cultural treasure, which originated in the 19th century for the harvesting of moliço (seaweed and other vegetation) used to fertilize sandy soil.
In the beginning, these boats were typically painted only with black pitch for protection from weather and water. However, about 1850, the first decorated panels on the prows of moliceiros made their debut, often created by builders to signify pride and ownership and, sometimes, to identify the boat to workers, according to Aveiro com Paixão.
"The moliceiros belong to this type of agro-maritime system, originally serving as vehicles, as agricultural implements but, very quickly, beyond their primary function, these vessels began to channel deeper cultural and symbolic meanings, offering a generous collection of fundamental meanings both in the identification of the territory and in its social cohesion, wrote Clara Sarmento, in the 565-page Prática, Discursos e Representações da Cultura Popular Portuguesa (2007).
"The distinctive feature of this boat lies in the set of four different panels which adorn it at the bow and stern, displaying distinctive motifs, serious and humorous, sacred and profane, in polychrome images of authentic 'popular art', complemented by handwritten captions, forming an indivisible iconic and verbal message."
The people of the Aveiro region are working to perpetuate the tradition.
UNESCO recognized moliceiro boat-making as an Intangible Cultural Heritage in Need of Urgent Safeguarding in December 2025. (Photo from CNN Portugal)
Until the end of the 1950s, moliço was harvested in quantities exceeding 200,000 tons per year (Luís Silva, 1985). Each boat could carry seven tons. Today, seaweed harvesting is nearing extinction, having declined throughout the 20th century due to socioeconomic changes, reduction in seaweed distribution and the use of chemical fertilizers, according to Passeio de Moliceiro.
The research conducted by Clara Sarmento, director of the Center for Intercultural Studies (CEI) at the Higher Institute of Accounting and Administration of Porto (ISCAP), on the moliceiro boat of the Ria (Lagoon) de Aveiro has contributed greatly to international recognition of this cultural heritage, according to Politécnico do Porto (January 23).
At the end of last year, the United Nations Educational, Scientific and Cultural Organization (UNESCO) recognized moliceiro boat-making as an Intangible Cultural Heritage in Need of Urgent Safeguarding.
Through a 2003 convention, UNESCO safeguards traditions, performing arts and craftsmanship by fostering international cooperation, creating specialized lists for protection, building national capabilities, promoting youth engagement and providing funding to ensure that traditions are passed down to future generations.
With this inscription, Portugal now has three heritage sites on the UNESCO list requiring urgent safeguarding. The other two are the black pottery of Bisalhães, in Vila Real Municipality (2016) and the manufacture of cowbells (2015). In addition, there are eight other sites classified as Intangible Cultural Heritage of Humanity and a Register of Good Safeguarding Practices, reported RTP (December 9, 2025), including the Cante Alentejano singing tradition (2014).
The National Inventory of Intangible Cultural Heritage already had registered the moliceiro in 2022 at the initiative of the Intermunicipal Community of the Aveiro Region.
The Municipality of Aveiro has promoted several strategies to maintain the vitality of the moliceiro, reported Expresso (December 10, 2025). It has supported initiatives in schools to introduce younger generations to this traditional font of knowledge and proposals such as installing electric motors on boats used for tourism.
There are only five mestres, master builders, still active -- four of them older than 60 years old, according to UNESCO, and just one artist, who has been decorating boats for more than 30 years, according to Moliceiro Boat: Naval Carpentry Art of the Aveiro Region (2025), the UNESCO video featured above. Mestres generally work on their own or in small family-run shipyards. They often receive assistance from family members, apprentices or other boat owners. Two can build a boat in one month.
On average, a moliceiro measures 15 meters (49 feet), allowing people to sleep at the bow as it was common for workers not to return home for several days. It displaces five tons and has a flat bottom, allowing navigation in the lagoon's shallow waters, reported RTP (December 9, 2025).
There were 1,342 moliceiros in 1883, according to Passeio de Moliceiro, which quotes João Lemos, Tu, Moliceiro (2022). The number dropped to 602 in 1967. Currently, the number is estimated at fewer than 50, the majority of which are motor-powered. The first moliceiros were propelled by sail and pole by the arms of the moliceiros (also the name of the person who harvested the moliço). Half of the current moliceiros operate mainly on tourist circuits in the urban canals, according to Expresso.
Specialized rakes are used to harvest moliço (seaweed and other vegetation). (Photo from Passeio de Moliceiro)
One Man's Memory
From the ahcravo gorim blog (August 12, 2010):
"A brief memory of my uncle César, who made such a big impression on me:
"Regarding the moliceiros and moliço, some rules and rituals
"In the Aveiro estuary, there are some islands, areas that remain dry throughout the year, among which three stand out in the northernmost area: Monte Farinha, Amoroso and Testada. The islands' wealth lay in the reeds which grew on dry land and the seaweed which grew underwater. On the island of Monte Farinha, there was once livestock, especially horses.
"The island of Amoroso had three partners, one of whom was my great-uncle, which is why I often accompanied him on his trips to the island for repairs to the canals and maintenance of the house that existed there, which had a well and a fig tree.
"In order to harvest seaweed from the submerged areas of the island, the owners paid the harbor master's office for a special license, but only those with permission from the owners could collect seaweed on the island. There were no exclusive zones for each boat; the entire submerged area could be exploited.
Map of Ria de Aveiro region showing the lagoon main channels and the location of their tributaries. The red stars and orange diamonds indicate the location of past flood events. (From Flood risk assessment in a coastal lagoon under present and future scenarios: Ria de Aveiro case study, December 2017)
"On Sunday mornings, after mass, dressed in their "going-to-God" attire, the moliceiros (traditional boatmen) would go to the house of my uncle, who was in charge of the Amoroso accounting. He awaited them at the door with a bottle of sweet wine and a stemmed glass, while holding a small cloth bag in his hands.
"Each moliceiro would approach my uncle and say: Mr. César, this week, there were "so many" boatloads of moliço (seaweed), each one costs "this much" . . . and they would put the money in the bag, drink a glass of wine, and go home.
"That's how it was until lunchtime: meetings of men of their word.
"It was with these principles that I was raised, and while I have biological parents, as we all do, I have another family in the river who educated me and made me the man I am."
The Ria de Aveiro Weekend is an annual event whose highlight is the Grande Regata dos Moliceiros (Great Moliceiro Regatta), which pays tribute to the history, ethnography and culture of the 11-municipality Aveiro region, according to Turismo Centro Portugal. In 2025, it was held on July 5th.
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