Mollusks are a group of animals in the phylum Mollusca, including oysters, mussels, clams, squid, and snails. But do you know which are the most beautiful shellfish in the world? Let me introduce ten of the most beautiful shellfish in the world: the whelk, nautilus, conch, triton shell, Venus whelk, rose whelk, flower whelk, heart whelk, white jade whelk, red peony whelk, saffron giant clam, harp whelk, and giant clam. Among them, the whelk is considered the most famous of the four great snails in the world, possessing an extremely beautiful shell. The other shellfish also have their own unique characteristics; let's appreciate their beauty together!

1. Conch
The conch (also known as the trumpet conch) is a precious sea snail, tall and pointed like a tower, its height less than half the total shell height, and the apex often has a defect. It lives in coral reefs, and its patterns resemble a magnificent phoenix tail. The colors of the conch are evenly distributed and vibrant, like a peacock's tail. They are large in size, with richly decorated shells that can be used as horns. The conch, along with the triton shell, the mahogany shell, and the nautilus, is known as one of the world's four most famous snails. Due to its unique shape, beautiful patterns, and rarity, the conch is considered the most precious of the four.

2. Nautilus
The nautilus is a marine mollusk with a thin, light, spirally coiled shell. The shell surface is often white or milky white, with growth lines radiating from the umbilicus, fine and smooth, usually reddish-brown. The entire spiral shell is smooth and disc-shaped, resembling a parrot's beak, hence the name "nautilus." This type of snail is mainly distributed in the tropical waters of the southwestern Pacific Ocean, and can also be found in the Malay Archipelago, the Taiwan Strait, and the islands of the South China Sea. Nautiluses are typically benthic animals, often slowly crawling along the seabed at depths of up to 100 meters.

3. Treasure Shell
The Triton Clam, one of the world's four most famous conches, has a slightly upturned tip, resembling a pouting little mouth. The entire shell displays a pattern of interwoven white, brown, and red, with vibrant colors and an outstanding luster. The thick, rounded lip is light brown, gradually deepening in color towards the interior of the shell. Some conch enthusiasts like to place Triton Clams in their aquariums because their dazzling colors make them resemble giant rubies in the water, often overshadowing other decorations in the aquarium.

4. Triton's crown snail
The Triton's Crown Conch is a large sea snail with an exceptionally captivating appearance. Its shape closely resembles the hat worn by Tang Sanzang in the classic Chinese novel *Journey to the West*, making the entire shell appear as a miniature version of his hat. Its shell surface is grayish-white with irregular reddish-brown markings, and large reddish-brown patches are present near the edge of the shell opening. The opening is flesh-colored with a lustrous sheen. The Triton's Crown Conch has extremely high ornamental value and is therefore frequently one of the most eye-catching shellfish at exhibitions.

5. Venus snail
The Venus conch, also known as the comb-spined conch, is a beautiful and delicate conch with a slender shell that can reach up to 12 centimeters in length, and is predominantly snow-white. Through long-term evolution in the ocean, it has developed a unique appearance: its siphons are exceptionally long and thin, and its shell is covered with bony, spiky protrusions arranged like comb teeth. This natural art form is highly sought after by collectors. According to Greek mythology, Venus, the goddess of love, often used a conch to comb her hair, hence the name Venus conch.

6. Rose Thousand-Handed Conch
The shell of the Rose Thousand-Handed Conch is sturdy and durable, with a towering spire, and its rugged ornamentation is highly prized. The shell is generally oval, full and elegant, with a long and wide anterior siphon and deep sutures. Its shell is densely covered with many prominent spines, resembling the thousand-armed Guanyin (Goddess of Mercy), a typical characteristic of the genus *Gnaphalium* in the family Gnaphalidae. At the ends of the spines of the Rose Thousand-Handed Conch are embedded pink or pale purple fern-like branches, resembling blooming roses; it is this feature that gives it the beautiful name "Rose Thousand-Handed Conch."

7. Flower Fairy Snail
Flower snails are also a fascinating type of shellfish. Typically, these snails range in length from 2 to 6 centimeters, with a tall, pointed spire covered in protrusions resembling tree branches. Their shells are usually nearly white, rarely displaying pink markings. There are many varieties of flower snails, including the Pilos' snail, the Garlic snail, the Taiwan snail, the Japanese snail, and the Mawa snail, among which the Taiwan snail is considered the most ornamental and representative.

8. Cone snail
Cone snails, also known as cone snails, are mainly distributed in tropical waters, typically inhabiting warm seas. They belong to the phylum Mollusca, class Gastropoda, and family Conodontidae, and are fascinating snails living on coastal coral reefs and beaches. The shell of the cone snail is pointed and slender at the front, while the rear is relatively thick, resembling a chicken's heart or a taro. They come in many varieties, with different colors and patterns, and are highly venomous marine creatures. This is because a tiny opening is hidden at the pointed end, containing venomous fangs capable of injecting deadly venom, potentially threatening the life of any victim.

9. White Jade Snail
The white jade snail is an exceptionally fascinating mollusk with a nearly spherical shell containing approximately six spirals. The spiral portion is quite prominent, occupying about one-third of the shell's height. The body whorls appear full, with a smooth, rib-free surface and fine growth lines. The shell is yellowish-white, dotted with purplish-brown spots. The mouth is oval, with a bluish-white interior. The outer lip is slightly arched, while the inner lip forms a nodule in the middle. The umbilicus is not very wide, and its lower half is covered by the nodule. It possesses a hard operculum. The shell is approximately 4.5 cm high, nearly oval in shape, and pure white in color. Most of the umbilicus is completely covered by the tunic, while the operculum is brownish and translucent.

10. Red Peony Conch
The Red Peony Cowrie typically measures 60 to 80 millimeters in length. Its shell is sturdy, generally oval-shaped, and coated with enamel, making it extremely smooth and lustrous. The shell is covered with brocade-like patterns, and the body whorls grow significantly. The aperture is narrow and elongated, forming a slit-like structure along the central line of the shell's dorsal side, almost equal in length to the entire shell. Due to its beautiful appearance, the Red Peony Cowrie is highly sought after by shell collectors and possesses significant ornamental and collectible value.
The list of the world's top ten best seashells is compiled based on information from various websites. It summarizes and organizes the characteristics of the shellfish, such as their appearance, color, and luster, and ranks them according to their popularity and rarity. The ranking is for reference only. If you have any questions, please feel free to comment or offer criticism at the end.