The Rubyspot Cardinalfish, Redspot Cardinalfish, Orangespot Cardinalfish, scientifically known as Ostorhinchus rubrimacula, is a captivating small fish species belonging to the cardinalfish family (Apogonidae). Renowned for its striking red spot, it is a vibrant addition to the marine environment.
Description & Characteristics
The Ostorhinchus rubrimacula is a petite fish, reaching a maximum size of 4.5 cm. Its most prominent feature is the vivid red spot adorning its body, a characteristic that lends it its various common names. While the precise coloration may vary, the species typically displays a pale yellow body with the distinct red spot. This striking color pattern serves as camouflage against the coral reefs where it resides.
Habitat and Occurrence
The Ostorhinchus rubrimacula is a creature of the shallows, thriving in the tropical waters of the Indo-Pacific region. It prefers the warm waters of the Indo-Pacific, particularly those associated with coral reefs. Its depth range extends from the surface to 33 meters, indicating its preference for environments with ample light penetration. This preference for shallow, coral-rich environments makes the Ostorhinchus rubrimacula a common sight in marine zones like the tropical reefs of the Indian Ocean and the Pacific Ocean.
Taxonomy
The species Ostorhinchus rubrimacula belongs to the Class: Teleostei, Order: Kurtiformes, and Family: Apogonidae. This classification places it within a diverse group of fishes characterized by their often-striking colors and their typically nocturnal habits.
Feeding
The Ostorhinchus rubrimacula is a carnivorous fish, relying on a diet of small invertebrates and zooplankton. Its menu includes copepods, Daphnia salina, fish larvae, Mysis, and other zoobenthos. This varied diet underscores its role as a significant component of the reef ecosystem’s food web.
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