The Hawaiian Blackhead Triplefin – Enneapterygius atriceps is a small, colorful fish found in the waters surrounding the Hawaiian Islands. It is a member of the triplefin blenny family, known for its distinctive three dorsal fins. This species is particularly notable for its striking black head and the unique patterns on its body.
Description & Characteristics
The Hawaiian Blackhead Triplefin – Enneapterygius atriceps is a relatively small fish, reaching a maximum size of 2.6 cm. Its most defining characteristic is its black head, contrasting sharply with the rest of its body. The body itself is typically a vibrant orange-red color, covered in dark spots and stripes that create a visually captivating pattern. The dorsal fins, a hallmark of triplefin blennies, are three in number, providing the fish with added stability and maneuverability.
Habitat and Occurrence
The Hawaiian Blackhead Triplefin – Enneapterygius atriceps is an inhabitant of the shallow reefs and rocky shores around the Hawaiian Islands. It prefers depths ranging from 1.0 to 23.0 meters, making it a common sight in both the intertidal zone and deeper reef habitats. This species is well-adapted to living in the turbulent environments of these marine zones, utilizing its strong fins and streamlined body to navigate the currents and cling to surfaces.
Taxonomy
The species Enneapterygius atriceps belongs to the Class: Teleostei, the most diverse class of fish, which are known for their bony skeletons. It is further classified within the Order: Blenniiformes, a group encompassing the blennies, combtooth blennies, and triplefins. The Family: Tripterygiidae, to which Enneapterygius atriceps belongs, is characterized by the presence of three dorsal fins, a feature that gives these fish their common name: triplefins.
Feeding
The Hawaiian Blackhead Triplefin – Enneapterygius atriceps is a planktivore, meaning it feeds primarily on plankton. Plankton are microscopic organisms that drift in the water, providing a crucial food source for many marine species. The small size and agile nature of the Hawaiian Blackhead Triplefin make it well-suited for catching and consuming these tiny organisms.
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