Valenciennellus tripunctulatus, commonly called the constellationfish,[3] is a species of fish in the family Sternoptychidae (hatchetfish).

[4][5][6] Valenciennellus tripunctulatus is small, growing no longer than 3.1 cm (1.2 in).

[7] It darkens its body at night by pigment dispersion.

[8] Valenciennellus tripunctulatus lives all the world's non-polar oceans.

[7][9] Valenciennellus tripunctulatus is a selective daytime feeder on copepods (mainly Pleuromamma) and ostracods (such as Conchoecia).