Gill Maggots

Gill Maggots

Gill maggots are the mature females of the parasitic crustacean Ergasilus.

Ergasilus (gill maggots) will appear as grayish black and white parasites several millimeters long infesting the gills.

Heavy infestations can cause severe damage, eroding the gill filaments and allowing secondary infections to develop.

See More Parasitic Koi Diseases

Anchor Worm (Lernaea)

Anchor Worm (Lernaea)

Crustacean parasite, Lernaea - Anchor worm is a common parasite on our Koi which is clearly visible to the naked eye and can reach 10 to 12mm. The parasite burrows its head into the Koi's tissue, under a...(click on product image for more details)
Costia

Costia

Costia is a minute Flagellate with 3-4 flagella. It affects both the skin and gills of Koi, and reproduces itself by binary fission. Infestations of this parasite can appear very rapidly indeed, and Koi...(click on product image for more details)
Fish Lice (Argulas)

Fish Lice (Argulas)

Argulus or fish lice as they are commonly called are a very major threat to your fish’s health. They can cause significant morbidity and mortality when heavily infesting your fish and they have been known...(click on product image for more details)
Skin and Gill Flukes

Skin and Gill Flukes

Gill and Skin flukes are two of the family of monogenetic trematode genera, all of which are characterised by the large grappling hooks which are used to attach themselves to their victims. Flukes are...(click on product image for more details)
Trichodina

Trichodina

Trichodina is one of the easiest protozoan parasites to detect under the microscope as it is almost perfectly round with hundreds of hooks which resemble cilia found its periphery and it constantly rotates...(click on product image for more details)
White Spot (Ich or Ichthyophthirius)

White Spot (Ich or Ichthyophthirius)

Caused by Ichthyopthirius multifiliis. The white spots on the skin, gills and fins are individual protozoan cells that are under the skin and feed on the body fluids and cells. They then punch out of the...(click on product image for more details)