| 11. | It is an ectoparasite of fish which infests the gills.
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| 12. | Parasites can be internal ( endoparasites ) or external ( ectoparasites ).
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| 13. | This species is host to the ectoparasites " Trochicola entericus"
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| 14. | This is an ectoparasite that lives exclusively on humpback whales.
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| 15. | This technique has also been used to combat other ectoparasites.
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| 16. | These envelopes screen the sleeping fish from predators and ectoparasites.
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| 17. | A further hypothesis is that human hair was reduced in response to ectoparasites.
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| 18. | The scent may also act as an ectoparasite repellent.
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| 19. | Being a migratory ectoparasite, Mesocriconema xenoplax spends its life in the soil.
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| 20. | They contain many feather mites, being ectoparasites of birds and occasionally mammals.
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