Due to their large size and mesoparasitic life history there have been a number of studies of Pennella , the members of which are among the largest of the parasitic Copepoda .
The males are free swimming .
Due to males ' large size and mesoparasitic life history there have been a number of studies of Pennella , the members of which are among the largest of the parasitic Copepoda .
The males are free swimming .