Pseudocalanus minutus is a small copepod found in the Arctic Ocean and surrounding waters.

[2] Pseudocalanus minutus is found primarily in the Arctic, but it is also found in the northwest Atlantic, the northern Pacific,[2] and more temperate waters where Atlantic and Arctic waters are mixed.

[1] In Toyama Bay, P. minutus reproduces from February to April, producing two generations.

All stages are found at shallower depths during the night (diel vertical migration) in Toyama Bay during this time.

[1] It develops during the winter and reproduces with energy gained from the spring phytoplankton bloom, indicating a one year life cycle.