[5] It is a deep water species found throughout the year with peak abundance occurring in May or June.

[6] C. bicuspidatus has a cosmopolitan distribution, although several of its subspecies are more restricted, possibly representing cryptic species.

Its prey includes ciliates, rotifers, small cladocera, young copepods and fish larvae.

In turn, C. bicuspidatus is eaten by fish including the alewife, bass, bloaters, ciscoes, carpsuckers, perch, sculpin, shiners, whitefish and walleyes.

In Lake Ontario, the population of C. bicuspidatus declined significantly after the invasive cladoceran Cercopagis pengoi was introduced.