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[[Image:Linguatula taenioides.jpg|right|thumb|150px|Copyright Cooper Curtice (Washington, Government Printing Office, 1890) Wikimedia Commons]]
[[Image:Linguatula taenioides.jpg|right|thumb|150px|Copyright Cooper Curtice (Washington, Government Printing Office, 1890) Wikimedia Commons]]
*Also known as the 'tongue worm'
*Also known as the 'tongue worm'
*Are highly specialised [[Arthropods|arthropods]]
'''Recognition'''
'''Recognition'''
==Sea Lice==
==Sea Lice==
*Economic imortance to the fish farming industries
**Especially in North American and in Northern Europe
*''Lepeophtheirus'' is found only the Northern hemisphere
*''Caligus'' is found worldwide
'''Recognition'''
*Males measure 6mm in length
*Females measure 1cm long
**Have a long egg sac
*5 pairs of legs
**3 pairs for swimming
**2 pairs modified for eating
*Brown to red in colour
*Similar in appearance to the horse shoe crab
'''Life Cycle'''
*Eggs released from long egg sacs into environment
*2 non-parasitic larval stages
*7 parasitic larval stages (nauplius)
**Copepod, chalimus and pre-adult
*Life cycle takes 3 weeks to 4 months depending on temperature
'''Epidemiology'''
'''Pathogenesis'''
''Control'''
*Ectoparasites
*Hidden antigen vaccine
*Wrasse which feed on sea lice
*Managment improvements
**E.g. ''All in, all out'' and 6 week fallowing
*Stock selection
**e.g. Selective breeding for resistance
==Links==
==Links==
[[Respiratory Parasitic Infections - Pathology#Linguatula serrata|Pathology of ''Linguata serrata'' in the nasal passages]]
[[Respiratory Parasitic Infections - Pathology#Linguatula serrata|Pathology of ''Linguata serrata'' in the nasal passages]]