Siphonostomatoida is an order of copepods, containing around 75% of all the copepods that parasitise fishes. Their success has been linked to their possession of siphon-like mandibles and of a "frontal filament" to aid attachment to their hosts. Most are marine, but a few live in fresh water. There are 40 recognised families:
The Cyclopoida are an order of small crustaceans from the subclass Copepoda. Like many other copepods, members of Cyclopoida are small, planktonic animals living both in the sea and in freshwater habitats. They are capable of rapid movement. Their larval development is metamorphic, and the embryos are carried in paired or single sacs attached to first abdominal somite.
Xenocoelomatidae is a family of cyclopoid copepods in the order Cyclopoida. There are at least two genera and four described species in Xenocoelomatidae.
Pseudanthessiidae is a family of cyclopoid copepods in the order Cyclopoida. There are about 7 genera and more than 60 described species in Pseudanthessiidae.
Lubbockiidae is a family of cyclopoid copepods in the order Cyclopoida. There are about 7 genera and 15 described species in Lubbockiidae.
Xarifiidae is a family of cyclopoid copepods in the order Cyclopoida. There are about 5 genera and more than 90 described species in Xarifiidae.
The Corallovexiidae are a family of strictly marine parasitic copepods associated with corals and, together with members of the family Asterocheridae, dominate their ecological niche in the West Indies; in the Indo-Pacific, they are replaced by the families Lichomolgidae and Xarifiidae.
Taeniacanthidae is a family of cyclopoid copepods in the order Cyclopoida. There are more than 20 genera and 120 described species in Taeniacanthidae.
Rhynchomolgidae is a family of cyclopoid copepods in the order Cyclopoida. There are more than 40 genera and 280 described species in Rhynchomolgidae.
Vahiniidae is a family of cyclopoid copepods in the order Cyclopoida. There are at least two genera and two described species in Vahiniidae.
Thamnomolgidae is a family of cyclopoid copepods in the order Cyclopoida. There are at least three genera and four described species in Thamnomolgidae.
Mytilicolidae is a family of cyclopoid copepods in the order Cyclopoida. There are about 5 genera and 14 described species in Mytilicolidae.
Synaptiphilidae is a family of cyclopoid copepods in the order Cyclopoida. There are at least 3 genera and about 10 described species in Synaptiphilidae.
Anchimolgidae is a family of cyclopoid copepods in the order Cyclopoida. There are more than 30 genera and 130 described species in Anchimolgidae.
Antheacheridae is a family of cyclopoid copepods in the order Cyclopoida. There are at least four genera and about seven described species in Antheacheridae.
Anthessiidae is a family of cyclopoid copepods in the order Cyclopoida. There are about 7 genera and more than 60 described species in Anthessiidae.
Clausidiidae is a family of parasitic copepods in the order Cyclopoida, containing the following genera:
Sabelliphilidae is a family of copepods belonging to the order Cyclopoida.
Cancerillidae is a family of copepods belonging to the order Siphonostomatoida.
Lichomolgidae is a family of copepods belonging to the order Cyclopoida.
