Editing Blue cod (section)

=== Parasites ===
Hewitt and Hine<ref name="HewittHine">{{cite journal | last1=Hewitt| first1=G.C. | last2=Hine| first2=P.M. | year=1972| title= Checklist of parasites of New Zealand fishes and of their hosts. | journal=New Zealand Journal of Marine and Freshwater Research |volume=6 |issue=1–2 |pages=69–114| doi=10.1080/00288330.1977.9515410| doi-access=free | bibcode=1972NZJMF...6...69H }}</ref> summarised the parasites found on blue cod including species in five main groups:

{| class="wikitable" style="text-align: left;"
|-
! style="width:20em;" |Group
! style="width:20em;" |Species
! style="width:20em;" |Location on host
|-
|[[Protozoa]]
|
*''[[Trypanosoma]] parapercis''
|
*[[Blood]]
|-
|[[Digenea]]
|
*''[[Apocreadiidae|Pancreadium]] otagoensis''
*''[[Opecoelidae|Plagioporus]]([[Caudotestis]]) pachysomus''
*''[[List of diseases and parasites in cod|Steringotrema]] rotundum''
*''Lecitocladium excisum''
*''[[List of diseases and parasites in cod|Gonocerca]] phyddis''
|
*[[Gastrointestinal tract|Intestine]]
*[[Gastrointestinal tract|Intestine]]
*[[Gallbladder|Gall bladder]] and [[stomach]]
*[[Stomach]]
*[[Stomach]]
|-
|[[Monogenea]]
|
*''[[Microcotyle]] constricta''
|
*[[Gill]]s
|-
|[[Nematode|Nematoda]]
|
*''[[Anisakis]]'' sp. larva
*Contracaecum ''(Thynnascaris)'' sp. larva
|
*[[Viscera]], [[Mesentery (zoology)|mesenteries]] and under [[peritoneum]]
*[[Stomach]], [[Gastrointestinal tract|intestine]] and body cavity
|-
|[[Copepod]]a
|
*''Aethon percis''
*''[[Caligus]] buechlerae''
|
*[[Gill]]s
*[[Skin]]
|}

Blood sucking [[sea louse|sea lice]] are also known to parasitise ''P. colias''.<ref name="NHNZ" />