In many species of copepods, males are rare and short-lived. This male of Scaphocalanus acrocephalus is readily distinguished from the female by his antennae and tail.

Image ID: expl0421, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Location: Beaufort Sea, North of Point Barrow, Alaska
Photographer: Russ Hopcroft
Credit: Hidden Ocean 2005 Expedition: NOAA Office of Ocean Exploration.

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