Pink Sea Fingers, scientifically known as Alcyonium hibernicum, are a captivating species of colonial soft coral commonly found in the cold, clear waters of the North Atlantic Ocean. These fascinating organisms are characterized by their distinctive pink, fleshy colonies, resembling fingers or plumes.
Description & Characteristics
Alcyonium hibernicum colonies typically range in size from a few centimeters to several inches in height. Each colony is composed of numerous polyps, small, individual organisms that form a cohesive, fleshy mass. The polyps, often referred to as “zooids,” extend from the central axis of the colony and are responsible for feeding and reproduction. The colonies themselves are vibrant pink in color, providing a striking contrast against the darker, rocky environments they inhabit.
Habitat and Occurrence
Alcyonium hibernicum thrives in the cold, clear waters of the North Atlantic Ocean, particularly in the intertidal and subtidal zones. Their preferred habitat includes rocky shores, kelp forests, and offshore reefs. This species is known to tolerate a wide range of depths, typically occurring from the low intertidal zone to depths of over 100 meters. This range places them within the Neritic zone, where they play a crucial role in the marine ecosystem.
Taxonomy
Alcyonium hibernicum belongs to the Class: Octocorallia, Order: Malacalcyonacea, and Family: Alcyoniidae. This classification places them within the larger group of cnidarians, which also includes jellyfish, sea anemones, and corals.
Feeding
Alcyonium hibernicum, like many other soft corals, is an azooxanthellate organism, meaning it does not rely on symbiotic algae for energy. They are nonphotosynthetic carnivores that feed on zooplankton, small crustaceans, and other microscopic organisms. Each polyp uses its tentacles to capture prey, which is then transported to the central axis of the colony for digestion.
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