The Takea were presumabely dumped into the Ocean following their creation, by the uncaring Brotherhood of Makuta, and naturally took residence in aquatic areas. The Population of Takea were known to be particularly dense around Metru Nui. While residing in the coasts of Metru Nui, the Takea were known to violently attack Matoran Transport Vessels and were known for their savagery.
However, following the Great Cataclysm causing Mata Nui to crash land on Aqua Magna, the population of Metru Nui's Rahi were led up to the surface as part of the camouflage system. The Takea Sharks, and other Aquatic Rahi species, were able to migrate to the waters of Aqua Magna. However, a number stayed behind in Metru Nui to serve Mavrah in His Battle against the Toa Metru.
As Metru Nui's Takea migrated to the surface, the majority of them headed towards the newly formed Island of Mata Nui. They reisded in the ocean surrounding the island for some time before the Matoran of Metru Nui were brought to the island by the Toa Metru; seeking refuge from Makuta Teridax.
However, one year after the Matoran had built their settlements, Teridax arrived on the island and began infecting Rahi with Infected Kanohi.