Host-Parasite Relationship
Parasite-host relationships involve at least one type of parasite and a host the parasite lives on. The parasite recieves the benefit of this relationship, and does not benefit, and often harming the host in some sort of way. However, the parasite usually does not try to kill the host directly, as the host is basically its shelter and may result in the parasite's death if the host dies.
Ommatokoita elongata is a parasite that is commonly found in the icy Arctic waters attached to the corneas of a Greenland shark (Somniosus microcephalus). This parasite causes visual impairment to these sharks but does not exactly affect the sharks hunting ability to a large extent, as Greenland sharks do not rely on keen eyesight for survival.
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