Diphyllobothriidea is an order of Cestoda (tapeworms). Members of this order are gut parasites of vertebrates. They infect

mammal A mammal () is a vertebrate animal of the Class (biology), class Mammalia (). Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three ...

s as their definitive hosts and use either

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 (a group of small crustaceans found in the sea and nearly every freshwater habitat, e.g. '' Spirometra'') or both copepods and fish as in the broadfish tapeworm as intermediate hosts.

References

Cestoda Platyhelminthes orders {{Cestoda-stub