Manas
Manas are a species of Rahi that exist in two color variants, one black, grey, and yellow and the other white, grey, and orange, and are armed with claws.

Manas were a type of gigantic, crab-like 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., both smart and strong, and reckoned the most dangerous of the Rahi on Mata NuiMata Nui (Location)An island created by accident on the Great Spirit's face, home to the Matoran for a thousand years.. MakutaMakuta (Species)Shadowy Antidermis beings and the Brotherhood's elite, Makuta commanded darkness and shaped the Matoran Universe's fate. kept them as the most powerful guardians of his lair, where no single Toa could hope to withstand a Manas's claws.
Toa Metru NokamaNokamaNokama served as Toa Metru of Water, endured the Hordika mutation, and led Ga-Koro and later Ga-Metru as Turaga through three eras. first encountered the creatures during her team's first journey to Mata Nui, watching two of them attack a sea slug Rahi. She named them "Manas," the Matoran word for monster. When the Toa Mata later reached Makuta's lair in MangaiaMangaia: Teridax's lair beneath Mata NuiMangaia was Teridax's hidden lair beneath the island of Mata Nui. It held a pool of Energized Protodermis used to make Infected Kanohi and Rahkshi., they faced a group of Manas under his control and could only overcome them by merging into the Toa Kaita, WairuhaWairuhaWairuha is a Toa Kaita and member of the Toa Nuva, native to Artakha, who serves as a Guardian of the Matoran. Wearing the Great Rua Nuva, Wairuha wields enhanced powers of Air, Water, and Ice alongside Enhanced Wisdom, and carries the Air Katana and Aqua Axes. and AkamaiAkamaiAkamai is a Toa Kaita and member of the Toa Nuva, formed from the combined essence of three Toa, who serves as a guardian of the Matoran. Born of Artakha, Akamai wields the Great Aki Nuva and commands enhanced powers of Fire, Stone, and Earth alongside Enhanced Valor, and carries Magma Swords, a Kodan Ball, and Feet Additions into battle, clad in red, brown, and black..
Two Manas were later encountered by Toa OnuaOnuaOnua was the Toa Mata and Toa Nuva of Earth, a quiet, deliberate warrior whose patience and underground mastery anchored his team across the Matoran Universe. Nuva and Turaga 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. during their search for the Kanohi Nuva. Karzahni also kept several Manas in his own domain. The creatures were drawn to heat, and in the wild they would turn on one another once they ran out of opponents to fight. Onua once exploited this nature by pitting a Kofo-Jaga against a group of Manas to defeat them. Like other Rahi, a Manas could be subdued by knocking off its infected Kanohi.
Gallery

Images via BIONICLE Wiki (Biosector01)
Sources
- WikiManas, Bionicle Fandom wiki cross-reference
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Followed from this entry

Rahi
The Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts.

Akamai
Akamai is a Toa Kaita and member of the Toa Nuva, formed from the combined essence of three Toa, who serves as a guardian of the Matoran. Born of Artakha, Akamai wields the Great Aki Nuva and commands enhanced powers of Fire, Stone, and Earth alongside Enhanced Valor, and carries Magma Swords, a Kodan Ball, and Feet Additions into battle, clad in red, brown, and black.

Wairuha
Wairuha is a Toa Kaita and member of the Toa Nuva, native to Artakha, who serves as a Guardian of the Matoran. Wearing the Great Rua Nuva, Wairuha wields enhanced powers of Air, Water, and Ice alongside Enhanced Wisdom, and carries the Air Katana and Aqua Axes.

Mangaia: Teridax's lair beneath Mata Nui
Mangaia was Teridax's hidden lair beneath the island of Mata Nui. It held a pool of Energized Protodermis used to make Infected Kanohi and Rahkshi.

Nokama
Nokama served as Toa Metru of Water, endured the Hordika mutation, and led Ga-Koro and later Ga-Metru as Turaga through three eras.

Onua
Onua was the Toa Mata and Toa Nuva of Earth, a quiet, deliberate warrior whose patience and underground mastery anchored his team across the Matoran Universe.
Mentioned in31 entries
Aki
The Kanohi Aki was the Great Mask of Valor worn by Akamai, the Toa Kaita formed by Tahu, Onua, and Pohatu during the assault on the Manas.
Aki Nuva
The Kanohi Nuva Mask of Valor, the Nuva-tier upgrade of the Aki, described in the guides but never formed in the story.
Bohrok Kaita Ja
A theoretical Bohrok Kaita comprising Lehvak, Kohrak, and Gahlok, capable of fusion in principle but never assembled during the active swarm period.
Gali, Toa of Water
The Toa Nuva of Water and conscience of the Toa Mata, whose attunement to her element anchored the team across every campaign from Mata Nui to Karda Nui.
Icarax
He thought scheming was for the weak and said so out loud, so the canon made sure the thing that finally killed him was a scheme.
Kanohi Rua
The Great Mask of Wisdom, formed only when a Toa Kaita merged three Great Kanohi into a single silver mask granting levitation, water breathing, and x-ray vision.
Karzahni
A realm of the Matoran universe built by the Great Beings as a place to repair Matoran, turned into a prison by its incompetent ruler.
Makuta's Revenge: The Toa Mata, the Manas, and the First Confrontation in Mangaia
The chronicle of how the Toa Mata penetrated the chamber beneath Mata Nui, overcame the awakened Manas as the merged Toa Kaita, and stood for the first time in the lair of Makuta Teridax.
Mana-Ko
Massive crab-like Rahi created by the Brotherhood but shielded by the Order of Mata Nui from Teridax's mental control.
Mangaia: Teridax's lair beneath Mata Nui
Mangaia was Teridax's hidden lair beneath the island of Mata Nui. It held a pool of Energized Protodermis used to make Infected Kanohi and Rahkshi.
Onua
Onua was the Toa Mata and Toa Nuva of Earth, a quiet, deliberate warrior whose patience and underground mastery anchored his team across the Matoran Universe.
Subterranean Worm
A blind worm Rahi believed to eat raw Protodermis, native to the tunnels beneath Onu-Wahi on Mata Nui, and recorded in confrontation with Turaga Whenua and Toa Nuva Onua during the search for the Kanohi Kaukau Nuva.
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