The fishing boat returning from the ocean is full of seafood, and there is also a dense layer of shells hidden at the bottom of the boat. What kind of species are these shells?Can it be eaten like seafood?Are they a lucky "bonus" for fishing boats?
Barnacles: protagonists of the ecology of the bottom of the boat.
The attachment on the bottom of the fishing boat constitutes a complex ecosystem that includes barnacles, seaweed, and other small marine organisms. Among them, our common gray-white shells are barnacles. Barnacles are mollusks with conical or cylindrical shells, made of calcareous or protein, and have spiral-shaped scales at the top, resembling curved rattans.
Barnacle habits.
Barnacles typically live in intertidal zones and shallow sea areas, attaching to hard surfaces such as rocks, turtle shells, or man-made structures by long, curved stalks. They adapt to the impact of tides and waves and are found in warm oceans and tropical regions.
Reasons why it cannot be eaten.
Although mollusks are the same as shellfish, barnacles on the bottom of fishing boats are inedible. First of all, barnacles on the bottom of a boat grow in an extremely harsh environment, and the special coatings applied to the bottom of the boat can contain a variety of harmful chemicals. Secondly, the waters near the bottom of the ship have been heavily polluted due to the discharge from the hull and barnacles are not hygienic.
Ill effects of "parasites" on the bottom of the ship.
The attachment of barnacles leads to increased hull friction, which can slow down the boat by 15 to 30 percent, while causing wear and scratches on the hull surface. The attachment of a large number of barnacles also affects the maneuverability and maneuverability of the ship, increases fuel consumption, and adversely affects the handling and safety of the ship. On the bottom of fishing vessels, barnacle attachment can also lead to clogging and entanglement in fishing nets, making fishing and net manipulation more difficult.
The role of barnacles in the ecosystem.
However, barnacles are not exactly "parasites", they play an important role in the ecosystem. Barnacle attachments and body tissues are food for other organisms, including crabs, shellfish, and small fish. The presence and growth of barnacles also have an impact on the community structure and species diversity of benthic organisms, regulating the richness and relative abundance of species in the ocean.
Edible values and cultural traditions.
Barnacles grown in a healthy environment have some edible value for humans. Some regions such as Spain, Portugal and Japan have a tradition of eating barnacles. Barnacles are similar to shellfish and are cooked in a variety of ways, including steaming, stir-frying, and boiling soups. There are more than 1,000 species of barnacles, distributed in different marine environments in the world's oceans, and one of them, called "gooseneck barnacles", is rich in protein, vitamins and minerals, is a low-fat, low-cholesterol food, rich in taste, and is part of the traditional dishes of some regions. Due to the difficulty of collection, ** is usually high.
Conclusion. 
Barnacles are inedible and difficult to clean up as a by-product of ships going to sea, but as part of the ecosystem, they have an impact on the ecological balance and functioning of the ocean. For humans, understanding the ecological role of barnacles, while respecting their place in traditional cultures, is an important part of protecting the marine environment and using resources sustainably.
This article provides an in-depth analysis of the barnacle ecosystem at the bottom of fishing boats, revealing its unique role in marine ecology. First of all, the article vividly describes the appearance and living habits of barnacles, introducing the reader to a mysterious and complex underwater world. With clear language and structure, the authors succeed in transmitting scientific knowledge to readers so that they can understand the role of barnacles in the marine ecosystem.
It is worth noting that when discussing the reasons why barnacles cannot be eaten, the article fully emphasizes the influence of environmental factors on barnacles. Through the harmful substances in the ship's bottom paint, as well as the pollution of the water area by the hull discharge, the authors point out the health and safety problems of barnacles that are not suitable for consumption. On the one hand, this reminds the reader, but also raises some questions worth thinking about about people's consumption of seafood.
The article further highlights the negative effects of barnacles on ships, such as increased friction, slowing down ships, and damaging hulls. This section combines scientific and technical issues with actual nautical transport, making it easier for the reader to understand the substantive impact of these issues on the operation of ships. At the same time, by introducing the blockage and entanglement of barnacles in fishing nets, the problems of barnacles on fishing and fishing activities are further emphasized, so that readers can fully understand their negative effects.
To its credit, the article ends with a clever twist that emphasizes the positive role of barnacles in the ecosystem. Barnacles play a positive role in maintaining the ecological balance of the ocean by serving as food for other organisms** and regulating the community structure and species diversity of benthic organisms. This positive perspective provides readers with a more holistic and balanced understanding of the complexity of barnacles in the ecosystem.
Finally, the article introduces the edible value and cultural traditions of barnacles, presenting a more colorful picture for readers. Through the tradition of eating barnacles in places like Spain, Portugal and Japan, readers can get a glimpse into the ways in which different cultures use this creature, reflecting the diversity of human uses of natural resources.
Overall, this article skillfully integrates scientific knowledge into practical problems through simple descriptions, and successfully provokes readers to think about the sustainable use of marine ecosystems and resources. The structure of the article is compact, the hierarchy is clear, and the language is fluent, and it is a popular science article with a high amount of information.
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