Fikou
Metru Nui's Tunnel Spiders
Small arachnid Rahi associated with Metru Nui's Maintenance Tunnels, the reason the tunnel network earned the nickname Fikou Web.

The Fikou were a small arachnid RahiRahiThe Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts. species, a tree spider found across Le-WahiLe-WahiLe-Wahi is a region on the island of Mata Nui, inhabited by the Le-Matoran and Rahi. Formerly subject to the power of Teridax, the region is no longer under that influence., Le-MetruLe-MetruThe teal district where Le-Matoran managed everything that moved through Metru Nui, from chutes to airships., and Onu-MetruOnu-MetruThe deep archive-city that made mining and historical records preservation the beating heart of Metru Nui., most strongly associated with the Maintenance TunnelsThe Maintenance TunnelsThe underground tunnel network beneath Metru Nui, nicknamed the Fikou Web, used by Archivists, Vahki, and the Toa Metru during the escape from the city. running beneath Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive.. Their presence in that subterranean network was sufficient that the MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. population came to refer to the tunnels collectively as the Fikou WebFikou WebThe maintenance tunnel system beneath Metru Nui's Archives, named for how its paths twist like spider silk..
Range and behaviour#

Fikou inhabited the Maintenance TunnelsThe Maintenance TunnelsThe underground tunnel network beneath Metru Nui, nicknamed the Fikou Web, used by Archivists, Vahki, and the Toa Metru during the escape from the city. beneath Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive. in sufficient numbers to define the character of those passages. Surviving Onu-MatoranOnu-MatoranEarth-wielding Matoran of the deep who adapted to darkness and built the Matoran Universe's defensive cavalry. records describe them as small, eight-limbed predators with a compact body and natural defences sufficient to threaten an isolated MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body., though not large enough to pose serious danger to a ToaToa (2001)Biomechanical heroes bonded to elemental powers and masks. Not born, but chosen and transformed.. The species was catalogued in standard RahiRahiThe Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts. reference materials alongside other Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive. fauna of comparable scale.
The Fikou were a consistent feature of the tunnel ecology rather than a transient infestation. Their territorial range covered the broader network of service corridors used by Onu-MatoranOnu-MatoranEarth-wielding Matoran of the deep who adapted to darkness and built the Matoran Universe's defensive cavalry. ArchivistsArchivistA Matoran keeper of records and relics, the Archivist held one of Metru Nui's deadliest jobs. and maintenance workers.
The Fikou Web#
The Maintenance TunnelsThe Maintenance TunnelsThe underground tunnel network beneath Metru Nui, nicknamed the Fikou Web, used by Archivists, Vahki, and the Toa Metru during the escape from the city. acquired the popular name Fikou WebFikou WebThe maintenance tunnel system beneath Metru Nui's Archives, named for how its paths twist like spider silk. on account of the species' density within them. The single most consequential recorded encounter occurred during the Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety.'s journey to recover the Great DisksThe Great DisksThe six legendary Kanoka of Metru Nui, one hidden in each district, recovered by the Toa Metru during the Morbuzakh crisis and later fused into the Kanohi Vahi., when WhenuaWhenuaToa Metru of Earth and later Turaga of Onu-Koro, formerly an Onu-Metru archivist whose career in the Archives shaped his role across the rescue of Metru Nui and the long residency on Mata Nui., former Onu-MetruOnu-MetruThe deep archive-city that made mining and historical records preservation the beating heart of Metru Nui. ArchivistArchivistA Matoran keeper of records and relics, the Archivist held one of Metru Nui's deadliest jobs., led the team through a hidden shortcut by opening an entrance from the road surface into the tunnel network and the connected ArchivesThe Archives of Metru NuiThe Archives of Onu-Metru were the central repository of Matoran knowledge and Rahi specimens, maintained by the Archivist Corps beneath the city's surface..
The attack that followed was not the work of the Fikou. The Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety. were beset by a rolling fog and a swarm of agitated fireflyers, with MatauMatauA former Le-Metru test driver who became a Toa Metru, Matau wielded air, illusion, and shape-shifting before sacrificing his Toa power to wake the sleeping Matoran. dispersing the fog to reveal an Insect Control Rahkshi responsible for the disturbance. The Fikou themselves remained part of the tunnel's ambient population rather than active combatants in the engagement.
Onu-Metru association#
Onu-MetruOnu-MetruThe deep archive-city that made mining and historical records preservation the beating heart of Metru Nui., the Earth district of Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive., housed both the ArchivesThe Archives of Metru NuiThe Archives of Onu-Metru were the central repository of Matoran knowledge and Rahi specimens, maintained by the Archivist Corps beneath the city's surface. and the entry points to the Maintenance TunnelsThe Maintenance TunnelsThe underground tunnel network beneath Metru Nui, nicknamed the Fikou Web, used by Archivists, Vahki, and the Toa Metru during the escape from the city.. Onu-MatoranOnu-MatoranEarth-wielding Matoran of the deep who adapted to darkness and built the Matoran Universe's defensive cavalry. ArchivistsArchivistA Matoran keeper of records and relics, the Archivist held one of Metru Nui's deadliest jobs. were the population most likely to encounter Fikou as part of ordinary work, and WhenuaWhenuaToa Metru of Earth and later Turaga of Onu-Koro, formerly an Onu-Metru archivist whose career in the Archives shaped his role across the rescue of Metru Nui and the long residency on Mata Nui.'s familiarity with the tunnel shortcut reflected his pre-ToaToa (2001)Biomechanical heroes bonded to elemental powers and masks. Not born, but chosen and transformed. career cataloguing the RahiRahiThe Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts. of the lower city. His element was Earth, in keeping with the standard correspondence between Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive.'s districts and elements.
Worldbuilding role#
The Fikou were a low-visibility resident species whose presence shaped the popular geography of Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive. more than its formal records. The persistence of the Fikou WebFikou WebThe maintenance tunnel system beneath Metru Nui's Archives, named for how its paths twist like spider silk. name in MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. usage indicated that the tunnels were understood by ordinary city residents as belonging in some sense to the species, even where the Onu-MatoranOnu-MatoranEarth-wielding Matoran of the deep who adapted to darkness and built the Matoran Universe's defensive cavalry. maintenance crews and ArchivistsArchivistA Matoran keeper of records and relics, the Archivist held one of Metru Nui's deadliest jobs. treated them as workspace. The Fikou were one of several background RahiRahiThe Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts. populations present in Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive.'s subterranean environment before the Great CataclysmThe Great CataclysmThe day Makuta Teridax put the Great Spirit to sleep, the Great Spirit Robot fell from the sky, Metru Nui flooded, and Voya Nui tore loose from the Southern Continent..
Frequently asked questions
- What are Fikou in Bionicle?
- Fikou were a small arachnid Rahi species, a tree spider found across Le-Wahi, Le-Metru, and Onu-Metru, and most strongly associated with the Maintenance Tunnels beneath Metru Nui. They were small, eight-limbed predators with a compact body, colored orange and black, with teeth as their natural weapon.
- Why are the Maintenance Tunnels called the Fikou Web?
- The Matoran population came to call the Maintenance Tunnels the Fikou Web because the Fikou were present there in such density. The persistence of the name in Matoran usage indicated that ordinary city residents understood the tunnels as belonging in some sense to the species.
- How dangerous were Fikou?
- Fikou had natural defences sufficient to threaten an isolated Matoran, but they were not large enough to pose serious danger to a Toa. They were a consistent feature of the tunnel ecology rather than a transient infestation.
- What is the most notable recorded Fikou encounter?
- The single most consequential recorded encounter occurred during the Toa Metru's journey to recover the Great Disks, when Whenua led the team through a hidden shortcut into the tunnel network and the Archives. The attack that followed was not the work of the Fikou; the Toa Metru were beset by a rolling fog and agitated fireflyers, and Matau dispersed the fog to reveal an Insect Control Rahkshi responsible for the disturbance.
- Why were Onu-Matoran most familiar with Fikou?
- Onu-Metru housed both the Archives and the entry points to the Maintenance Tunnels, so Onu-Matoran Archivists and maintenance workers were the population most likely to encounter Fikou as part of ordinary work. Whenua's familiarity with the tunnel shortcut reflected his pre-Toa career cataloguing the Rahi of the lower city.
Sources
- WikiFikou — BS01 character/subject entry
- BookBIONICLE Adventures 3: The Darkness Below — Maintenance Tunnels and Fikou Web reference
- BookBIONICLE: Rahi Beasts — Reference appendix listing
- BookBIONICLE: Encyclopedia Updated — Reference entry list
Spotted a factual error or a primary source we missed? Email a correction. Every flagged claim gets reviewed.
Related entries
Archivist
A Matoran keeper of records and relics, the Archivist held one of Metru Nui's deadliest jobs.
Onu-Metru
The deep archive-city that made mining and historical records preservation the beating heart of Metru Nui.
Fikou Web
The maintenance tunnel system beneath Metru Nui's Archives, named for how its paths twist like spider silk.
Le-Metru
The teal district where Le-Matoran managed everything that moved through Metru Nui, from chutes to airships.
The Great Disks
The six legendary Kanoka of Metru Nui, one hidden in each district, recovered by the Toa Metru during the Morbuzakh crisis and later fused into the Kanohi Vahi.
The Maintenance Tunnels
The underground tunnel network beneath Metru Nui, nicknamed the Fikou Web, used by Archivists, Vahki, and the Toa Metru during the escape from the city.
Mentioned in6 entries
BIONICLE Reference Books
Six Scholastic and AMEET reference titles published between 2003 and 2009 form the primary printed canon for the Matoran Universe. This page catalogs what each book contains and where the editions diverge.
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The Vahki model assigned to Ko-Metru, the Keerakh enforced silence in the Knowledge Towers and subdued lawbreakers with staffs that scrambled a Matoran's sense of time and place.
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Large coral crab Rahi native to the ocean of Ga-Metru and the reefs of Ga-Wahi, briefly tamed during the Bohrok War and later conscripted by Carapar.
Tehutti
Tehutti was an Onu-Matoran archivist of Metru Nui, one of the six finders of a Great Disk, whose Archives research produced the Matoran Nui technique.
The Maintenance Tunnels
The underground tunnel network beneath Metru Nui, nicknamed the Fikou Web, used by Archivists, Vahki, and the Toa Metru during the escape from the city.
Fikou Web
The maintenance tunnel system beneath Metru Nui's Archives, named for how its paths twist like spider silk.
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