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1. Anchor Worm (Lernaea)
Lernaea (anchor worm) is not actually a worm, it is a copepod crustacean.
http://www.pond-life.me.uk/fishhealth/lernaea.php
2. Chilodonella
Chilodonella is a leaf-shaped motile ciliated protozoan 30-70µ long and 30-50µ wide. It can be identified through a microscope at 100x magnification but, as it is slower moving, it is a little more difficult to spot than Trichodina and costia.
http://www.pond-life.me.uk/fishhealth/chilodonella.php
3. Costia (Ichthyobodo)
Ichthyobodo is a microscopic flagellate protozoan measuring 10 - 20µm long and 5 - 10µm wide with one pair of flagella.
http://www.pond-life.me.uk/fishhealth/ichthyobodo.php
4. Fish Leech (Piscicola geometra)
Piscicola geometra is the most common fish leech found in garden ponds. It differs from other true parasites, such as Argulus and Lernaea, in that it only needs to attach to the fish for feeding.
http://www.pond-life.me.uk/fishhealth/piscicolageometra.php
5. Fish Louse (Argulus)
Argulus (fish louse) is a common fish parasite. It is a flattened disc-shaped, jelly-like crustacean of the class Branchiura.
http://www.pond-life.me.uk/fishhealth/argulus.php
6. Fish Parasite Videos
Videos of the most common fish parasites to aid identification.
http://www.pondlife.me.uk/fishhealth/parasitevideos.php
7. Flukes (Gyrodactylus and Dactylogyrus)
Skin flukes (Gyrodactylus) and gill flukes (Dactylogyrus) are monogenean trematodes of the family Dactylogyridae.
http://www.pond-life.me.uk/fishhealth/gyrodactylus.php
8. Parasites
These are drawings of the most common parasites found on sturgeon. There are others but these cause most of the problems.
http://www.sturgeon-web.co.uk/parasites.php
9. Trichodina
Trichodina is a microscopic protozoan parasite measuring 50 - 100µm in diameter. Trichodina is only visible under a microscope and is easily identifiable.
http://www.pond-life.me.uk/fishhealth/trichodina.php
10. White Spot (Ichthyophthirius multifiliis)
White spot disease, or Ich, is caused by the parasite Ichthyophthirius multifiliis, a species of ciliate protozoan.
http://www.pond-life.me.uk/fishhealth/ichthyophthirius.php
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