How big are antennas of planktons?

Plankton, which includes both phytoplankton and zooplankton, vary widely in size, and their "antennas" can differ significantly based on the species. For instance, copepods, a type of zooplankton, have long, segmented antennae that can be several times the length of their bodies, often around 1-2 centimeters. In contrast, other planktonic organisms may have much smaller or less pronounced appendages. Overall, the size and structure of these antennae are adapted to their specific functions, such as locomotion and sensing their environment.