Whalesuckers impose a hydrodynamic cost to their host , their adhesive disks can abrade the skin .
Whalesuckers sometimes attach to inconvenient locations , such as near the blowhole or the genitals .
Whalesuckers impose a hydrodynamic cost to their host , their adhesive disks can abrade the skin , and they sometimes attach to inconvenient locations , such as near the blowhole or the genitals .