Top 14 Most Fascinating Facts About Snails

While most land snails are non-toxic, certain marine snails are venomous. If you experience food poisoning after eating snails, it’s likely due to improper preparation. The cone snail, found in the ocean, is one of the deadliest creatures in the world—its bite can be fatal. Despite this, many have started breeding these snails in secret to harvest their slime for use in culinary dishes, skincare products, and even medicine. While it may sound like a rumor, this underground practice is gaining traction and poses significant risks—not only to human health and safety but also to the environment.

Recently, the Food Safety Administration issued a warning about the dangers of consuming wild snails. The parasites they carry can attack the human brain, leading to neurological disorders, meningitis, brain hemorrhages, and other serious conditions.

Never consume snails raw, undercooked, or without properly cleaning them. They should not be cooked whole without first being cleaned with salt or disinfecting agents. Natural snails and clams should be thoroughly cleaned to avoid parasites. It’s essential to control the environment and eliminate snails and parasites in residential areas to break the life cycle of the A. cantonensis roundworm and reduce the risk of illness.

Consuming improperly prepared snails can lead to symptoms such as blurred vision, blindness, stiff neck, cardiovascular issues, breathing difficulties, paralysis of the central nervous system, mental disorders, unconsciousness, and even death. Those who consume snails regularly may develop severe pneumonia, internal bleeding, and respiratory hemorrhages. Therefore, consider the risks carefully before deciding to eat snails.

Currently, there is no specific cure for meningitis caused by the A. cantonensis parasite, even with anti-parasitic medications. According to reports, over 3,500 cases of meningitis due to this parasite were recorded in more than 30 countries worldwide by 2000, resulting in an increase in white blood cell count.

Snail meat is highly nutritious, containing 11% protein (compared to clams at 8.8%, oysters at 4.6%, and mussels at 4.5%), 6.2% sugar, 150mg of calcium per gram, 71mg of phosphorus per gram, and essential amino acids such as leucine, alanine, valine, glutamic acid, and aspartic acid. Flower snails can be prepared both on an industrial scale or at home. Additionally, when the meat of flower snails is hydrolyzed with hydrochloric acid or lye, it creates a fragrant liquid that is rich in protein and commonly used as a dipping sauce.

France holds the record for the highest consumption of flower snails, consuming around 50,000-60,000 tons per year, with about 20,000 tons imported from other countries. A popular French dish made from these snails is garlic buttered escargot with parsley.

According to the Chinese Medicine Dictionary, snails are believed to have cooling and detoxifying properties, and are used to treat common conditions such as heatstroke, excessive thirst, sore throats, boils, hemorrhoids, rectal prolapse, and insect bites.

The parts of the flower snail used in traditional medicine are its meat and slime. Known as 'oa ngưu' in Chinese medicine, the snail has a salty taste, cool properties, and a slippery texture. It is known to have nourishing, detoxifying, anti-inflammatory, diuretic, and antispasmodic effects. According to the Southern Herbal Medicine Handbook, one remedy involves crushing 1-2 flower snails, mixing them with a bit of water, and applying the mixture to paper with a small hole to treat acne and skin eruptions on the face.

Another remedy involves roasting two flower snails until golden, finely chopping them, and boiling them to create a concentrated solution, which is then mixed with 50g of mashed bamboo shoots to extract the juice. This is consumed 1-2 times a day to treat asthma and arthritis. It can also be made into lozenges by combining equal parts of flower snail meat and preserved plum to relieve sore throats and difficulty swallowing.

The slime of the flower snail, which coats its body inside the shell, is used to treat insect bites. Its alkaline properties neutralize the acidic venom from scorpion stings, offering relief and reducing pain.

The venom of the flower cone snail (Conus striatus), found mainly in the Polynesian islands and ranging in length from 6 to 18 cm, has been of interest since 1803 due to its diverse properties. Researchers at the La Rochelle University’s laboratory for natural bioactive compounds (Sesnab) analyzed this venom and found that it is similar to the venom of scorpions, spiders, and snakes. It contains 25 conopeptides (toxic molecules) that affect the nervous and muscular systems in various ways. Studies show that this venom effectively inhibits calcium, making it useful for treating conditions linked to excessive calcium in the nervous system, such as muscle disorders and memory decline (Alzheimer’s). However, a significant challenge is that introducing these conopeptides into a patient’s body could cause their nervous system to become unable to accept any calcium, potentially leading to death.

Currently, several research institutions are isolating five specific conopeptides from the snails and attempting to determine the physiological receptors that can accept these toxins. The hope is that this will lead to the development of effective treatments.

• From the marine snail Conus textile, neurologist George Milijianich (USA) developed a painkiller called zinocotidine, which is reported to be many times more effective than morphine.
• Research is also being conducted on the brain’s reflexes through snails.

Due to the complexity of the human brain, which is made up of an intricate network of neurons, understanding how it functions is a time-consuming and challenging process. Scientists are studying the brains of simpler animals to gain insights that can be applied to human brain function. Researchers such as Professor Paul Benjamin at the University of Lussex (UK) and Professor Eric Kandel at Columbia University (New York, USA) have studied the central nervous system of the Aplysia snail, which consists of just 20,000 neurons (compared to hundreds of billions in humans) and has neurons that are 1,000 times larger than human neurons. Additionally, these cells group together in clusters of 10 molecules. By conditioning snails with different reflexes, these studies have demonstrated the existence and function of memory in snails. Using microscopes and other equipment, scientists have gathered critical data on biochemical processes occurring within snail cells as they respond to stimuli, such as touch or electrical impulses. These findings help improve our understanding of brain activities, such as how memories are formed, stored, and recalled, and why memory loss occurs. This research is increasingly relevant as the incidence of Alzheimer’s disease grows with increasing life expectancy.

It may sound strange or even a bit unsettling, but snail slime is being hailed as the ‘golden elixir’ by beauty experts. The following 10 facts will introduce you to this trendy beauty ingredient.

• In ancient Greece, snail slime mixed with milk was used to treat skin rashes. Its popularity grew when farmers in Chile discovered that contact with snails made their skin unexpectedly smooth.
• Produced to protect the delicate, almost translucent skin of the snails themselves, this slime has the ability to block UV rays, retain moisture, and protect the skin from inflammation and damage. Compounds like hyaluronic acid, glycoproteins, and proteoglycans, found in snail slime, are commonly used in skincare products.
• Snail slime stimulates the production of collagen and elastin, which helps moisturize and repair damaged cells. This nourishing substance also helps protect the skin against wrinkles, acne, redness, dark spots, burns, scars, and warts.
• Pure snail slime undergoes several purification processes. Some cosmetics today claim to contain up to 97% purity, but to determine quality, it’s important to refer to reviews from users who have tried the products.
• Though many types of snails exist, only a few are used for beauty treatments. The most common is Cornu Aspersum, a species originally considered an agricultural pest.
• In specialized farms across France, South Korea, Chile, and other countries, snail slime is harvested on-site, then processed and packaged for shipment to laboratories. Some farms produce several tons of slime annually.
• Many South Korean cosmetic brands incorporate snail slime into products like face masks, moisturizers, serums, and even lipsticks. Most of these products are colorless, odorless, and easily recognizable by their characteristic neutral hue.
• In addition to South Korea, Thailand and other Asian countries have also recognized the importance of snail slime. In Thailand, some spas even apply live snails directly to the skin for treatment. However, due to hygiene concerns, this method remains controversial.
• While snail slime has many benefits, using homemade slime can be very dangerous if not properly tested. Snails found in gardens or on the streets often carry parasitic worms that can easily be transmitted through skin contact.
• Snail slime is effective but not for everyone. To avoid allergic reactions, it’s recommended to test a small amount on your skin for two weeks before using it regularly.

To answer the question, 'How do snails carry such large shells on their backs?', here is a detailed anatomical image of a snail.

From the image above, you can observe the internal structure of a snail, with its shell housing vital organs and body parts. Snails hatch from eggs and begin to eat their own eggshells, which serve as a rich source of calcium. This calcium is essential for the development of their hard body parts, which, in the case of snails, form their shells.

Throughout a snail's life, its soft tissues gradually harden and its shell develops. The growth of a snail's shell over time is similar to the process of bone development in humans.

The snail's shell is not just a hollow structure but an indispensable part of its body. Unlike hermit crabs, which seek protection by collecting discarded shells of other creatures, a snail's shell is an integral part of its body, and vice versa.

Everyone knows that the butterfly stroke is one of the most difficult swimming techniques, but a species of sea snail has mastered this skill.

The Limacina helicinia, known as the 'butterflies of the sea,' has been spotted gracefully swimming through the icy waters of the Arctic, using fleshy wings that extend from its shell to flutter through the water. However, the exact mechanics of its movement remain a mystery.

Using high-speed cameras, researchers uncovered the snail's secret swimming technique. They discovered that its movement resembles the figure-eight pattern of butterfly wings on land.

Scientists at the Georgia Institute of Technology created a special tank to observe this unique creature. David Murphy, the lead researcher, shared with the Journal of Experimental Biology, 'Most plankton move using a paddling technique.'

With the help of the tank and advanced cameras, the research team uncovered the fluid swimming technique of the sea snail. They were amazed to discover that the snail's figure-eight wingbeat generates thrust in the water, much like a butterfly's flight. The snail strikes its wings together before separating them to propel itself forward, creating tiny vortices of water around it.

The Crysomallon squamiferum, commonly known as the scaly-foot gastropod, typically resides at depths of around 2,400 meters beneath the ocean's surface. This species is remarkable for its ultra-hard shell, which is made up of three distinct layers. These layers provide the snail with exceptional protection, allowing it to withstand powerful impacts and defend against predators. The outermost layer is composed of iron sulfide, while the inner, spongy layer serves as a shock absorber. The unique shell structure of this snail has inspired scientific research, influencing the design of armored suits for military applications.

This deep-sea hydrothermal snail is the only known creature on Earth that uses iron in the composition of its shell for protection. Each layer of its multi-layered shell plays a vital role in enhancing its defense capabilities. The shell consists of three layers:

• The outermost layer, about 30 micrometers thick, is made of iron sulfide. This layer is designed to break upon impact, which helps the snail absorb energy and deters potential attackers.
• The middle layer consists of organic keratin, similar to the protein coating found on other snail shells. This layer, the thickest of the three at approximately 150 micrometers, functions as a cushioning material that reduces the impact on the snail.
• The innermost layer is made of aragonite, a form of calcium carbonate commonly found in the shells of other mollusks and corals.

Overall, this snail's triple-layered shell, constructed with iron sulfide and a shock-absorbing middle layer, serves as an extraordinary defense mechanism. The design has inspired military research, with the hope of developing stronger, more resilient armor for protective gear.

Ampullariidae, thường được gọi là ốc sên táo, là một trong những loài có chất độc mạnh. Trong trứng của loài ốc sên này có hai loại độc đặc biệt là antinutritive và antidigestive, khiến đối tượng ăn phải trứng bị rối loạn tiêu hóa và không thể hấp thụ chất dinh dưỡng cần thiết khi ăn uống. Chất độc trong trứng của ốc sên táo có chứa trong thực vật hoặc do vi khuẩn tạo ra, còn trong thế giới động vật, chúng là loài duy duy nhất chứa chất độc này.

Ốc sên nón sở hữu vũ khí lợi hại là chiếc răng có hình dáng như một cây lao để săn mồi. Khi một con mồi bơi lại gần, ốc sên nón sẽ mở rộng phần vòi nhỏ và phóng chất độc. Sau khi bắn trúng, ốc sên nón sử dụng "cây lao" để kéo con mồi. Loài sên này có thể bắn "cây lao" chứa nọc độc vào mồi với tốc độ 400km/h.

Ốc sên Lymnaea pereger là loài động vật chân bụng sống phổ biến trong các hồ nước ở Anh, có khả năng đặc biệt thích ứng với môi trường sinh sống. Các nghiên cứu cho thấy khi loài ốc sên này sống chung với cá, chúng có khả năng thay đổi màu sắc và thậm chí cả vỏ cứng từ dạng xoắn ốc sang dạng tròn nhằm đối phó với kẻ thù.

Most land snail species are herbivores or omnivores, with only a few being primarily carnivorous. Their diet is mainly composed of plants, followed by fungi, animal matter, and soil, although these preferences come from studies on larger snails, particularly those from Europe. Even within a single species, snails exhibit diverse eating habits, depending on what food is available within their range of movement. Unlike many herbivorous invertebrates, which tend to have specialized diets, most land snails are generalists, sampling a variety of foods along their paths.

Land snails are most active at night or during moist weather since they need slime, which is mostly water, to move. The humid environment helps reduce moisture loss. After becoming active, snails search for food using chemical receptors on their four tentacles, similar to how mammals use their noses. One species from Pennsylvania, the Anguispira Alternata, has even learned to navigate around fences to find food by following its scent trail.

If you observe larger land snails, you will notice that when they move, their upper tentacles are often fully extended, sometimes waving, to detect chemical gradients in the air. As they approach food, their smaller lower tentacles become more active, often bending or touching the food. Snails also use their mouths and feet to touch the food before they begin scraping it with their radula inside their mouths.

The mating process of snails is prolonged, lasting between 10 to 12 hours. Emerging from their shells, the snails entwine in an unbreakable bond, twisting together and apart in an endless, tireless dance of affection.

Hermaphroditic: Each snail possesses both male and female reproductive organs, allowing both to function simultaneously during mating. After about 15 days, both snails lay eggs, each producing 120-150 eggs.

Snails are mollusks with large, thick shells. Their heads are equipped with two tentacles, and their bodies are entirely covered by a slimy secretion. Snails prefer damp, tree-rooted environments. Although they move slowly, the fastest recorded snail, a garden snail in France, can travel 60 cm in just 2 minutes.

In the wild, snails can hibernate for months during dry seasons, but with the arrival of spring rains, they awaken and resume their normal activities. Snails navigate by scent and have two eyes located at the tips of their tentacles. The Achatinidae family is widespread, with the common flower snail (Achatina fulica) being quite familiar. At two years old, these snails can weigh between 50-60 grams, and in some cases, up to 140 grams. The largest snail species, Achatina achatina, found in Africa, can reach a size of 39 cm in length and weigh up to 900 grams.