About Abudefduf sordidus (Forsskål, 1775)
Blackspot sergeant, also known by the scientific name Abudefduf sordidus (Forsskål, 1775), are typically yellowish-grey. They have six broad brown bars, six to seven narrow light-colored bars, and a distinct black spot at the upper base of the tail. Fully grown individuals can reach a maximum total length of 24 centimeters (9.4 inches), and wild individuals are known to live up to nine years. This species is commonly found in tidepools and shallow rocky areas that experience moderate surge, at depths ranging from 0 to 3 meters (0 to 10 feet). Juvenile blackspot sergeants are most often found in tidepools, where they feed on algae, small animals, and plankton. As they mature and grow larger, they move to deeper areas with greater surge. Blackspot sergeants are highly territorially aggressive, particularly toward other fish that share their tidepool habitat. During the daytime, they are commonly found close to rocky areas, while at night they take shelter under various objects. This species is oviparous. Males construct nest sites in rocky areas to attract females, and they are thought to become especially aggressive during this mating period.
