During studies in 1972 on the setation and development of the secondary sexual characters of the Norway lobster, Nephrops norvegicus (L., 1758), Foraminifera were observed attached to the pleopods of a mature male (carapace length 2.47 cm). On subsequent examination of the prepared material with a scanning electron microscope it was found that the Foraminifera were attached to one of the first pair of pleopods. Three individuals were observed, all of which were attached to the same pleopod on the inner surface near the tip. No further specimens of Foraminifera were encountered during detailed anatomical studies of more than 30 specimens of N. norvegicus.