Yarrell’s blenny – Chirolophis ascanii

Yarrell’s Blenny, scientifically known as Chirolophis ascanii, is a species of fish belonging to the Stichaeidae family. This fish is commonly found in a variety of marine environments, playing a crucial role within its ecosystem.

Description & Characteristics

Chirolophis ascanii is a relatively small fish, typically reaching a maximum size of 25.0 centimeters. They exhibit a slender, elongated body shape that allows them to navigate the intricate crevices and rocky habitats they favor. Their appearance is characterized by a distinctive, slightly compressed body, along with a prominent dorsal fin that extends almost the entire length of their back.

Habitat and Occurrence

Yarrell’s Blenny is a benthic species, meaning it primarily resides on the bottom of the ocean floor. They are often found in the depths of the ocean, ranging from 10.0 to 400.0 meters. This depth range places them within the bathyal and abyssal zones, characterized by their dim light conditions and cooler temperatures. They are particularly common in the North Atlantic Ocean, inhabiting various rocky reefs, kelp forests, and seagrass meadows. Their distribution also extends to the North Sea, the English Channel, and the Mediterranean Sea, making them a prominent fish species throughout these regions.

Taxonomy

Chirolophis ascanii belongs to the Class: Teleostei, Order: Perciformes, and Family: Stichaeidae. This classification places them within a diverse group of fish, with the Perciformes being the largest order of vertebrates, known for their spiny-rayed fins. The Stichaeidae family, commonly known as pricklebacks, is distinguished by their elongated bodies, and a single dorsal fin that runs the length of their backs, making them recognizable within the marine ecosystem.

Feeding

Yarrell’s Blenny exhibits a diverse diet, feeding on a variety of organisms found within their benthic habitat. They are known to consume algae, aquatic plants, cnidaria, hydrozoa polyps, invertebrates, krill, mysis, shrimps, sea squirts, snails, sponges, worms, and zoobenthos. This diverse diet highlights their important role in the food web, contributing to the balance and stability of their marine ecosystems.