''Peniculus'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of marine

copepod Copepods (; meaning 'oar-feet') are a group of small crustaceans found in nearly every freshwater and saltwater habitat (ecology), habitat. Some species are planktonic (living in the water column), some are benthos, benthic (living on the sedimen ...

s in the family

Pennellidae Pennellidae is a family of parasitic copepods. When anchored on a host, they have a portion of the body on the outside of the host, whereas the remaining anterior part of the parasite is hidden inside tissues of the host. Genera There are 24 ge ...

. They occur worldwide and typically parasitize coastal or epipelagic fish, with the exception of ''Peniculus hokutoae'' that was found parasitizing a mesopelagic myctophid, ''

Symbolophorus evermanni ''Symbolophorus'' is a genus of lanternfishes. It feeds on various small forms of sea life, in particular fish. Some species in this genus are known to exhibit the Stylophthalmine trait in their larval A larva (; : larvae ) is a distinct juv ...

''.

Species

There are 11 recognized species:

References

Siphonostomatoida Copepod genera Taxa named by Alexander von Nordmann {{copepod-stub