50 Fun Facts About Snails

Roman emperors wore robes dyed which colour, made from the mucus of thousands of murex sea snails?

Purple cloth cost a fortune because about twelve thousand snails gave only enough dye for the trim of one garment. By the fourth century, only the emperor was allowed to wear it.

What is the name of SpongeBob SquarePants's pet sea snail, who meows like a cat instead of talking?

Gary shares the pineapple house with SpongeBob, and his meows are performed by Tom Kenny, the same actor who voices his owner.

Which predatory sea creature fires a venomous harpoon whose sting has killed dozens of people?

Cone snail venom works so fast that one species is nicknamed the cigarette snail, for the time a victim supposedly has left. A drug for severe chronic pain, ziconotide, was developed from it.

In the DreamWorks film Turbo, a garden snail given super speed tries to win which motor race?

Indianapolis 500 glory is the dream of Theo, a snail voiced by Ryan Reynolds, who calls himself Turbo and gains his speed in a freak accident.

What French word names the restaurant dish of land snails baked in their shells with garlic butter?

Escargot is simply the French word for snail, borrowed by English speakers to mean only the edible kind. The snails are shelled and cooked, then put back into the shells with the butter.

Which artist created The Snail, a huge collage of paper cut-outs that hangs in London's Tate Modern?

Henri Matisse cut the shapes with shears from paper painted with gouache, a method he turned to after he stopped painting around 1950. The finished work is nearly three metres square.

In William Golding's Lord of the Flies, the shell of which sea snail is blown to call meetings?

Conch in hand, Ralph gathers the survivors and is elected their chief. Order on the island collapses when a boulder kills Piggy and smashes the shell.

Italians call which keyboard symbol the chiocciola, meaning snail, when reading out an email address?

The at sign is a snail in several languages: Belarusian and Esperanto speakers use their own word for snail too, and Indonesians sometimes call it a snail A.

The landmark negligence case Donoghue v Stevenson began with a dead snail in a bottle of what?

Ginger beer poured over ice cream in a café in Paisley, Scotland, made legal history: May Donoghue's claim against the bottler laid the foundation of the modern law of negligence.

The snail darter, which the US Supreme Court protected by halting the Tellico Dam, is what kind of animal?

A fish no longer than a finger, the snail darter feeds mostly on small river snails. Congress exempted the dam anyway, yet the species recovered and left the endangered list in 2022.

Which rock-clinging sea snail has teeth made of the strongest biological material known?

Limpet teeth outperform even spider silk in tensile strength. The animal needs them because it feeds by scraping algae off bare rock.

Before mating, some land snails stab each other with which sharp chalky spike, made in an internal sac?

A love dart does not carry sperm at all. Mucus on it holds a compound that helps the shooter's own sperm survive inside the partner.

The scaly-foot snail of deep-sea vents armours its shell and foot with compounds of which metal?

Iron sulphides coat its shell and the hundreds of scales on its foot, making it the only living animal known to build a skeleton this way. It has been found only in the Indian Ocean.

A snail feeds by scraping with which ribbon-like tongue, covered in thousands of microscopic teeth?

Radula teeth work like a file, ripping food into small pieces. The ribbon creeps slowly forward, so fresh teeth reach the tip as the old ones wear out.

A snail's shell is built mainly from which compound, also the main ingredient of chalk and limestone?

Calcium carbonate, bound together with a mixture of proteins, makes up the shell. Newly hatched snails eat extra calcium to strengthen theirs.

Snails belong to which animal phylum, the same group as octopuses, squid, clams and oysters?

Molluscs form the second-largest animal phylum, and snails with their close relatives account for about 80 percent of all its named species.

The edible Roman snail, Helix pomatia, is also named after which French wine region?

Burgundy snails are prized on French menus, yet England protects the same species by law, making it illegal to kill, collect or sell one.

The glossy shells of which sea snail were once used as money across Africa, South Asia and East Asia?

Cowrie shells were the most widely used shell money in the world, and one species still carries the scientific name Monetaria moneta, the money cowrie.

Which coiled part of the human inner ear takes its name from the Latin word for a snail shell?

Cochlea comes from the Latin for snail shell because the organ is coiled like one. That coil is found in mammals, with the notable exception of the egg-laying monotremes.

Which edible sea snail has an ear-shaped shell lined with iridescent mother-of-pearl?

Abalone flesh is a delicacy eaten raw or cooked, and the nacre inside the shell shimmers from silvery white through pink to deep blue and green.

Snail blood turns blue when it carries oxygen because its pigment is built around which metal?

Copper atoms work in pairs to hold each oxygen molecule, and the pigment, haemocyanin, shifts from colourless to blue as they do. Octopuses, crabs and tarantulas carry it too.

Which author wrote The Snail and the Whale, in which a sea snail hitches a ride around the world?

Julia Donaldson, best known for The Gruffalo, has the snail advertise for a lift by writing with her own slime trail. A kind humpback answers the call.

Which US state twice spent nearly a decade wiping out invasions of giant African land snails?

Florida declared its second campaign won in 2021, only for new outbreaks to appear the following year. The snails can grow 20 cm long, among the largest of any on land.

George, a tree snail who died in 2019 as the last of his species, lived on which Pacific island group?

Hawaii's tree snails are all thought to descend from a single ancestral snail. George was named after Lonesome George, the Galápagos tortoise who was also the last of his kind.

Which English county has hosted the World Snail Racing Championships at Congham since the 1960s?

Norfolk's course is only 13 inches long, and the benchmark of two minutes was set in 1995 by a snail called Archie. The founder took the idea from a race he had watched in France.

Which European bird smashes snail shells open on a favourite stone, known as its anvil?

Song thrush youngsters are not born knowing the trick. They flick and play with objects until they learn to use an anvil as a tool for breaking snails.

The snail kite, an Everglades bird of prey, eats almost nothing but snails named after which fruit?

Apple snails are pulled from their shells with the kite's deeply hooked beak, shaped for exactly this diet. Water-level control in the Everglades has been depleting the snails.

A parasitic worm makes which part of a snail pulse like a caterpillar so that birds will eat it?

The eyestalks swell with the green, banded broodsacs of a flatworm called Leucochloridium. A bird that pecks one off becomes the parasite's next host.

Freshwater snails spread which tropical disease, also known as snail fever or bilharzia?

Schistosomiasis is caught simply through contact with contaminated fresh water, and it affected roughly 236 million people in 2019. Bilharzia honours Theodor Bilharz, who described its cause in 1851.

Many sea snails can shut themselves inside the shell with which hard trapdoor carried on the foot?

The operculum can match the outline of the shell's opening exactly, sealing the entrance like a fitted door. Those of some Red Sea snails were long burned as incense.

Which organ of a snail's body secretes the shell, adding fresh material to its rim for life?

The mantle never stops building, so the shell simply grows along with its owner. Land snails hatch as small adults, with no larval stage to pass through.

Garden snails breathe through a hole in the body called the pneumostome, which leads to what?

A single lung, formed from an air-filled cavity inside the shell, does the breathing. A muscular valve opens and closes the hole to let air in or out.

What name is given to the summer dormancy in which land snails shut down to survive heat and drought?

Aestivation takes its name from aestas, the Latin for summer. Snails often climb plants, posts and fences to sit it out, which has made some introduced species a farm nuisance.

Jeremy, a garden snail made famous by a public appeal to find him a mate, had which rare shell feature?

It coiled to the left, so Jeremy could mate only with another left-coiled snail. Two were found and sent to his keepers, only to mate with each other instead.

Which predatory snail, released on Pacific islands as pest control, wiped out native tree snails instead?

Rosy wolfsnail releases began in 1955 to curb giant African snails. The native tree snails bred so slowly that many species were hunted to extinction.

Powelliphanta, giant carnivorous snails that prey mostly on earthworms, live only in which country?

New Zealand's largest species grows a shell up to 9 cm across and can weigh 90 grams, a true heavyweight among land snails.

The sea snail Janthina spends its life afloat on the open ocean, hanging from a raft made of what?

Bubbles of air, each sealed in a clear coating the snail makes itself, keep it at the surface. From there it hunts drifting jellyfish relatives such as the Portuguese man o' war.

What is the technical name for snail farming, an industry centred on Spain, France and Italy?

Heliciculture is ancient: the Roman breeder Fulvius Lippinus kept the earliest snail farms on written record, near Tarquinia. Farmed snails now supply the cosmetics trade as well as kitchens.

Which animated series hid a small waving snail in every episode as a freeze-frame game for viewers?

Adventure Time creator Pendleton Ward, who also voiced the snail, wanted fans to pause each episode and search the background. He took the idea from the in-jokes in The Simpsons.

Which crime novelist kept hundreds of pet snails and once let some roam the table at a dinner party?

Patricia Highsmith kept 300 snails at one of her homes and wrote them into her fiction. One of her short stories is about pet snails that kill their owner.

In the margins of medieval manuscripts, snails are often drawn facing down which opponents?

Knights in these doodles usually look worried or shocked by their tiny foe. Nobody is sure what the scene meant, though one theory is that it was simply a medieval joke.

A French occultist of the 1850s claimed that telepathic snails could outperform which invention?

The telegraph was to be outdone by 24 pairs of snails, one pair per letter: touch one and its distant mate was supposed to react. At a trial in 1850 the messages arrived garbled.

A desert snail glued to a display card in 1846 was found alive four years later in which London institution?

The British Museum had taken the Egyptian snail for dead when it arrived. Once revived, it reportedly lived for two more years in a glass jar, eating mostly cabbage leaves.

The largest living snail, a sea snail with a shell around 70 cm long, is named after which country?

Australia gives its name to the Australian trumpet, which can weigh 18 kg. A shell-less relative, the California black sea hare, has been measured even longer.

During development a snail's body twists half a turn, leaving the anus above the head, in which process?

Torsion happens in two stages and is found in every gastropod, although sea slugs and their relatives have partly untwisted again.

During dry spells or hibernation, a land snail seals its shell with a lid of dried mucus called what?

The epiphragm is usually thin and elastic, but the Roman snail builds a hard, chalky one before winter, pierced by a tiny hole so that oxygen can still get through.

The name gastropod joins the Greek word for foot to the Greek word for which other body part?

Stomach and foot together make a name meaning stomach-foot, a nod to the way the animal's crawling foot sits directly beneath its guts.

Polymita picta, a painted snail prized for its vivid shell, lives only on which Caribbean island?

Cuba has protected the species since 1943 with a law banning its export. Poachers still take the shells to make jewellery and trinkets, and the snail has become endangered.

Brian the snail appears alongside Dougal the dog and Zebedee the jack-in-the-box in which children's series?

The Magic Roundabout reused footage from a French series, in which Brian was called Ambroise. Dougal was built without legs to make him easier to animate.

Memoir of a Snail, an Oscar-nominated film about a lonely woman who collects snails, uses which animation technique?

Stop motion was writer-director Adam Elliot's method, and the film won the top feature prize at the Annecy animation festival. It was only the second R-rated film nominated for the animated-feature Oscar.