• Ocean lovers enjoy collecting the many types of shells.sea shells image by Shirley Hirst from Fotolia.com
  
  Collecting beach shells is a common hobby among ocean lovers. Shells come in many shapes, sizes, and colors. Seashells come from animals that live in the ocean, known as mollusks. Mollusks are invertebrates that do not have an internal skeleton. These invertebrates use the shells as protection. A mollusk lives inside its shell, taking it wherever it goes. When the mollusks dies or grows out of its shell, the shell sinks to the ocean floor and lies vacant until another inhabitant claims it, or it washes up on the beach shore.
  
  

Cockleshell

• Cockle Shell are found in abundance.the shell image by Alexander Beliaev from Fotolia.com
  
  The most common type of seashell found on a beach is the cockleshell. These shells come in a variety of sizes and are a common home to clams. The shells are round or heart-shaped and have a ribbed texture. They come in many sizes and colors. Depending on the location of the shell, colors may vary from beige and blue, to purple and pink. Their color is affected by the natural elements surrounding the shell such as excessive sun exposure and extreme ocean activity.
  
  

Conch Shell

• Conch Shell can weigh up to five pounds.large conch seashell image by Mike & Valerie Miller from Fotolia.com
  
  Conch shells are normally the homes to snails and hermit crabs. Their spiral shape makes them very distinguishable. Considered a great find, conch shells can become as large as 12-inches and weigh up to five pounds. In some cultures, conch shells are used for ritual or religious activities. Blowing into them reveals a deep, trumpet-like sound.
  
  

Cowry

• Cowry shells have a polished look.shell image by Henryk Olszewski from Fotolia.com
  
  The cowry is a round, egg-shaped shell that contains a natural, polished look. They are the protective home to many types of sea creatures, but most commonly snails. They come in many shapes and colors and each contain its own unique patter. These patterns range in color and style.
  
  

Sand Dollar

• Sand dollars burrow in the sand.sand dollars image by itsallgood from Fotolia.com
  
  The sand dollar shell is the hard, external shell of a sand dollar. They are flat and round and have a white appearance. Live sand dollars burrow themselves into the sand to protect themselves from predators. While alive, sand dollars are green, blue, or purple but turn white when they dry out after death.