Bolinus brandaris, commonly known as the purple dye murex or rock whelk, is a fascinating marine gastropod mollusk native to the Mediterranean waters, including the coastal areas of the Comunidad Valenciana. It is a notable species due to its historical significance and unique features.

• Appearance: Bolinus brandaris has a robust and elongated shell characterized by its spiny surface and variegated patterns usually in shades of brown and tan. The shell's outer surface has distinct axial ribs and spiral cords.
• Habitat: This species typically resides in shallow waters along the rocky and sandy substrates where it can hide within crevices.
• Diet: Bolinus brandaris is carnivorous, feeding on bivalves and other small marine invertebrates. It uses its radula to drill through the shells of its prey.
• Reproduction: Known for laying clusters of egg capsules, the reproduction of Bolinus brandaris is remarkable for the vibrant purple dye released, famously used in ancient times for textile dyeing.
• Cultural Significance: In ancient civilizations, especially among the Phoenicians and Romans, this mollusk was prized for producing Tyrian purple dye, a highly valued and prestigious pigment.
• Local Importance: In the Comunidad Valenciana, it is also referred to as cañadilla and is a part of the local biodiversity contributing to the region's ecological richness.

Bolinus brandaris remains an intriguing example of the rich marine life found in the Mediterranean and continues to draw interest due to its historical and ecological relevance.