The St. Helena Wrasse – Thalassoma sanctaehelenae is a species of wrasse found in the waters surrounding St. Helena, an island in the South Atlantic Ocean. This brightly colored fish is known for its distinctive appearance and its role in the marine ecosystem of the region.
Description & Characteristics
The St. Helena Wrasse is a relatively small fish, reaching a maximum length of 12.5 centimeters. It exhibits a vibrant coloration, with a predominantly blue body and a yellow stripe that extends from the eye to the tail. The males are typically larger and more brightly colored than the females.
Habitat and Occurrence
Thalassoma sanctaehelenae is primarily found in shallow, rocky reefs, often in areas with strong currents. This species is endemic to the waters surrounding St. Helena, making it a unique inhabitant of this isolated island ecosystem. Due to its affinity for shallow, rocky reefs, it is typically found in the Neritic zone, the area of the ocean that extends from the shoreline to the edge of the continental shelf. This zone is characterized by its relatively shallow depths and abundant sunlight, providing suitable conditions for the St. Helena Wrasse’s habitat preferences.
Taxonomy
Thalassoma sanctaehelenae belongs to the family Labridae, which is a diverse group of fish commonly known as wrasses. These fish are classified within the order Eupercaria incertae sedis, a group of teleost fish whose precise taxonomic relationships are still being studied.
Feeding
The St. Helena Wrasse is a carnivorous fish that feeds primarily on small fish, invertebrates, and zooplankton. Its diet includes a variety of organisms found in its reef habitat, reflecting its role as a predator in the marine food web.
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