Variable Soft Coral – Alcyonium variabile

, Variable Soft Coral, Alcyonium variabile
Depth: 13 - 468 m

Alcyonium variabile, commonly known as the Variable Soft Coral, is a striking and diverse species of soft coral found in the North Atlantic Ocean. This coral is characterized by its vibrant, variable coloration and its delicate, branching structure, adding a touch of beauty to the underwater landscape.

Description & Characteristics

Alcyonium variabile exhibits a remarkable range of colors, showcasing shades of white, yellow, orange, red, and even purple. Its polyps, the individual feeding units of the coral colony, are small and numerous, giving the coral a velvety appearance. Each polyp extends from the colony’s central axis, creating a network of interconnected branches. The size of these colonies can vary significantly, ranging from a few centimeters to several decimeters in diameter.

Habitat and Occurrence

Alcyonium variabile is a common inhabitant of the rocky shores and reefs of the North Atlantic Ocean. It thrives in a variety of habitats, including sheltered bays, exposed headlands, and even deep-water canyons. This species is typically found in the infralittoral and circalittoral zones, ranging from the intertidal region to depths of several hundred meters. The Variable Soft Coral prefers areas with moderate water currents and good water quality, ensuring access to its food source and a stable environment for growth.

Taxonomy

Alcyonium variabile is classified within the phylum Cnidaria, belonging to the Class: Octocorallia, Order: Malacalcyonacea, and Family: Alcyoniidae. This family includes various species of soft corals, all characterized by their eight-tentacled polyps and their lack of a hard, calcareous skeleton.

Feeding

Alcyonium variabile, like many other soft corals, is a nonphotosynthetic organism, meaning it does not rely on sunlight for energy. Instead, it obtains its sustenance by capturing microscopic prey from the surrounding water. Its diet consists primarily of zooplankton, including copepods, amphipods, and other invertebrates. The polyps of Alcyonium variabile extend their tentacles, which are armed with stinging nematocysts, to capture prey. Once immobilized, the food is then transported to the coral’s central mouth for digestion.

Associated Species

Image References

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