the worlds largest shells is the conch.
The largest shell is Tridacna gigas or the giant clam shell. There is also a pretty large shell in Australia called the Australlian Trumpet shell. And I am sure prehistoric shells were even larger then the ones of today.
Soft shell crabs primarily inhabit coastal waters, particularly in estuaries and bays along the Atlantic and Gulf coasts of the United States. They are often found in sandy or muddy substrates where they can easily bury themselves. These crabs are typically found in brackish waters, which are a mix of salt and fresh water, as they require specific conditions to molt and grow into their soft shell stage.
Oyster Michele
The largest pearl shell found in Broome, Australia, is known as the "Broome Pearl." It measures about 2.5 meters (8.2 feet) in length and weighs approximately 14 kilograms (30.8 pounds). This impressive specimen highlights the region's rich pearling history and the significance of the industry in Broome. The shell serves as a testament to the remarkable marine life found in the area.
Paua is a species of Abalone (shellfish) found only in the waters of New Zealand.
The conch shell is actually the shell of a sea-dwelling mollusc known as a conch. There are many varieties of conch, with most living in the Indo-Pacific and Caribbean regions. Many are found in beds of sea grass in warm tropical waters.
geko
a big shell
The world's largest bivalve is Tridacna gigas or the giant clam which can reach more than 3 feet in length. The largest univalve is Syrinx Araunus or the Australian trumpet which can reach a length of approximately 40 inches.
A wentletrap is a type of marine snail with a spiral shell that is often prized for its intricate and delicate design. It is commonly found in tropical and subtropical waters around the world.
Black murex in Tamil is called "கருமுளை அம்பலம்" (Karumulai Ampalam). It is a type of sea snail known for its dark shell and is commonly found in the waters of Tamil Nadu.
A cockle shell is a type of sea shell found on shorelines.