The Green Eyed Cup Coral, scientifically known as Mycedium umbra, is a captivating coral species renowned for its distinctive appearance. Its vibrant green polyps, resembling shimmering eyes, are a striking feature against its olive-brown base, adding a touch of mystique to the underwater landscape.
Description & Characteristics
Mycedium umbra, commonly referred to as the Green Eyed Cup Coral, is a captivating coral species known for its vibrant appearance. Its most striking feature is its bright green polyps, resembling shimmering eyes, that stand out against its olive-brown base. These polyps, responsible for capturing food, are generally short and spread out across the colony’s surface, adding to its unique aesthetic. The base of the coral, composed of a hard, calcareous skeleton, serves as the foundation for the polyps, providing structural support and protection. While Mycedium umbra is known for its green coloration, some variations in hue may occur, with some colonies exhibiting shades of brown or tan.
Habitat and Occurrence
Mycedium umbra thrives in the Indo-Pacific region, encompassing a vast expanse of marine environments. Its typical habitat includes shallow reef slopes and lagoons, typically within a depth range of 10 to 50 meters. This species prefers a combination of moderate water flow and ample sunlight to support its symbiotic relationship with zooxanthellae, a type of algae that provides it with energy through photosynthesis. The Green Eyed Cup Coral can be found in a variety of marine zones, from tropical to subtropical regions. Its presence adds to the diversity and vibrancy of these aquatic ecosystems.
Taxonomy
Mycedium umbra belongs to the Class: Hexacorallia, Order: Scleractinia, and Family: Merulinidae. This classification places it within the larger group of stony corals, characterized by their hard, calcareous skeletons, and highlights its evolutionary relationships with other coral species.
Feeding
Mycedium umbra has a unique feeding strategy that combines both passive and active methods. It relies on a symbiotic relationship with zooxanthellae, a type of algae that lives within its tissues. These algae provide the coral with energy through photosynthesis, using sunlight to convert carbon dioxide into organic compounds. This symbiotic relationship provides the coral with a constant source of food, making it less reliant on external sources. However, Mycedium umbra also actively captures food, extending its polyps to filter plankton and other small organisms from the surrounding water. This dual feeding strategy allows the Green Eyed Cup Coral to thrive in a variety of environments.
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