Valparaiso chromis – Chromis crusma

The Damsel – Chromis crusma, also known simply as Chromis crusma, is a species of fish belonging to the Pomacentridae family. This colorful and active fish is commonly found in the tropical and subtropical regions of the Indo-Pacific.

Description & Characteristics

The Chromis crusma is a relatively small fish, reaching a maximum size of 14.0 cm. Its body is typically a bright yellow or orange, with a distinctive black stripe running horizontally along its sides. This stripe may be more prominent in some individuals, and the fish can exhibit variations in coloration depending on factors like location and age. They are often seen in schools, adding to their vibrant presence in the reef environment.

Habitat and Occurrence

The Chromis crusma is a predominantly reef-associated fish, with a preference for shallow coral reefs and rocky outcrops. They can be observed from the surface down to a depth of around 50 meters. The Chromis crusma is a widespread species found in the Indo-Pacific region, extending from the Red Sea and the East African coast to the Hawaiian Islands and the eastern Pacific. This distribution encompasses various marine zones, including the Tropical Pacific, the Tropical Indian Ocean, and the Temperate Northern Indian Ocean, further emphasizing their adaptability to diverse environments.

Taxonomy

The species Chromis crusma belongs to the Class: Teleostei, Order: Ovalentaria incertae sedis, and Family: Pomacentridae. This classification places them within the broad group of bony fishes, specifically within the order of damselfishes. The Pomacentridae family encompasses a wide variety of colorful and active fish, including other damsels, clownfish, and some species of angelfish.

Feeding

The Chromis crusma is a zooplanktivore, primarily feeding on tiny organisms drifting in the water column. Their diet consists of a variety of small invertebrates, including crustaceans, plankton, and other small organisms. Their constant movement through the water column allows them to efficiently search for food and take advantage of readily available sources.