Conch Shells
Conch shells are commonly found on Florida's shelling beaches. While a conch is alive, the shell is bright orange. After some time exposed to tropical sunlight once the conch is no longer present, the shell fades a bit. Conchs are the type of shell known for holding it up to an ear and "hearing" the ocean. These shells come in many sizes as there have been many conch species in Florida, but it is most common to find them a few inches long or less.
Cockle Shells, Cardita Shells and Calico Scallop Shells
The cockle shell is a fan-shaped shell similar to the Shell Oil logo, but a bit curved and thicker. They are somewhat speckled in shades of browns, tans and golds and are quite common. Some varieties are large enough that they are used by locals as soap dishes. Cardita shells are similar looking, with thicker ridges between color bands. They are often found on beaches. They grow up to 1 inch long.
The calico scallop looks exactly like the Shell Oil logo and is found up to 2 inches long.
Olive Shells
Olive shells often have a glossy finish and are a bit oval in shape, similar to an olive. They come in a variety of colors but can get bleached by the sun over time. An olive shell is usually less than 3 inches long.
Triton's Trumpet
This shell is prized for its size and color, and because it's difficult to find. It averages up to 16 inches long and is quite heavy. The colors are vivid in bands of whites and browns. It's similar in shape to a conch and does look like it could be used as a trumpet.
Lightning Whelk Shells
Lightning whelk shells are quite beautiful and bear resemblance to the conch, with a much longer narrow end. This is the only shell found in Florida that spirals to the left. The shell is usually a light color with dark banding. It is commonly found from 2 to 16 inches long.