Pecten jacobaeus, commonly known as the Mediterranean scallop or the "vieira," is a species of bivalve mollusk belonging to the family Pectinidae. This mollusk is native to the Mediterranean Sea and is particularly found along the coastlines of the Comunidad Valenciana.

The following characteristics define Pecten jacobaeus:

• Shell Description: The shell is fan-shaped and composed of two distinct valves. The exterior of the shell is generally rough with radial ridges, while the inner surface is smooth and may have a pearly sheen.
• Coloration: The shells of the Mediterranean scallop can vary in color but are commonly seen in shades of cream, white, or light brown, sometimes with reddish or purplish streaks.
• Size: It can reach up to 15 cm in diameter, although most specimens are smaller.
• Habitat: Pecten jacobaeus prefers sandy or muddy substrates and is typically found at depths of 10 to 200 meters.
• Diet: As filter feeders, these mollusks feed on plankton and other small organic particles suspended in the water.
• Reproduction: The species exhibits separate sexes and it spawns by releasing gametes into the water column where fertilization occurs.

The Mediterranean scallop is not only valued for its ecological role but also holds culinary importance in the region. Its succulent meat is a delicacy in numerous traditional dishes, particularly in the Valencian community.