Abstract
Ablation of antennular filaments, but not antennal filaments, selectively eliminates the chemically‐mediated host location behavior displayed by two species of symbiotic caridean shrimps to their respective hosts. It is suggested that the antennules of marine decapod crustaceans function in the distance perception of highly specific chemosensory stimuli as well as the previously reported generalized stimuli associated with feeding behavior.