Three species of piscine parasitic copepods previously undescribed fro
m southern African coastal waters were studied. Although sampling data
are incomplete, Lepeopthirius nordmanni(Edwards, 1840) taken from Thu
nnus and Mola spp., Euryphorus brachypterus-(Gerstaecker, 1853) from u
nknown host and locality and Nesippus orientalis Heller, 1868 from Thu
nnus thynnus, the bluefin tuna, are described and figured. Several mor
phological variations from other descriptions are noted for all three
species.