Male Copepod

In many species of copepods, males are rare and short-lived. This male of Scaphocalanus acrocephalus is readily distinguished from the female by features of his antennae and tail. View the “Under Arctic Ice photo essay to learn more.

Male copepods are distinctly different from female copepods.
Credit: 

R. Hopcroft, UAF, Hidden Ocean 2005 NOAA