Abudefduf sordidus, commonly known as the blackspot sergeant or kūpīpī in Hawaii, is a large solitary damselfish in the family Pomacentridae native to the tropical Indo-Pacific.

[3] Blackspot sergeants are common in tidepools and rocky shallow areas with moderate surge at a depth of 0 to 3 m (0 to 10 ft).

[3][6][7] Juvenile blackspot sergeants are common in tidepools where they feed on algae, small animals, and plankton.

[7][4] During the day they are often found near rocky areas, although at night they tend to take shelter under various objects.

[7] Blackspot sergeants are oviparous and males build a nest site in rocky areas to attract females.