Acropora hyacinthus, commonly known as Stone Coral, is a species of stony coral belonging to the family Acroporidae. It is a significant component of coral reefs, playing a crucial role in the marine ecosystem.
Description & Characteristics
Acropora hyacinthus is characterized by its robust branching structure, often forming intricate colonies. The coral polyps, which are responsible for building the stony skeleton, are typically small and densely packed, giving the coral its distinctive rough texture. While its exact size can vary, it is known to reach a considerable size, contributing to the complexity and diversity of the reef environment.
Habitat and Occurrence
Acropora hyacinthus is a subtidal coral species, meaning it thrives in the areas below the low tide mark. It can be found in a wide range of marine zones, from the lower limit of the intertidal zone, often referred to as the “intertidal,” all the way to the shelf edge at depths of around 200 meters. Its presence within these diverse habitats contributes to the rich biodiversity of the neritic zone.
Taxonomy
The species Acropora hyacinthus is classified within the Order Scleractinia, which comprises hard corals, and belongs to the family Acroporidae. This family is notable for its diverse array of branching and tabular coral species. The classification of Acropora hyacinthus within the Class Hexacorallia highlights its shared characteristics with other corals, including the possession of six-pointed tentacles.
Feeding
Acropora hyacinthus, like many other corals, relies on a symbiotic relationship with a type of algae called zooxanthellae. These algae live within the coral polyps and provide nourishment through photosynthesis. This process relies heavily on sunlight, which is why Acropora hyacinthus is found in shallow, sunlit areas. In addition to the zooxanthellae, Acropora hyacinthus also captures plankton, which is a vital source of nutrition.
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