Tallon Metroids are a strain of Metroids that originated from a batch of specimens multiplied by Space Pirates on planet Tallon IV. These flying, life energy-draining predators are encountered in both Metroid Prime and Metroid Prime 2: Echoes. They are not as resilient as most breeds of Metroid larvae seen elsewhere in the series, but they retain other traits of the species that make them highly dangerous.

Tallon Metroids have massive potential to mutate further, leading to the creation of additional aberrations present throughout the Metroid Prime series.

Biology and characteristics[]

For the most part, Tallon Metroids are nearly identical to the larvae from Zebes, Talvania, SR388, the BOTTLE SHIP and BSL Station: they have four-lobed red nuclei enclosed by a translucent membrane, with a mass of flesh underneath featuring two pairs of curved mandibles. They also behave similarly when hunting, such as using their larger pair of fangs for gripping onto their prey's head and the smaller pair for sapping energy. They are vulnerable to cold, and will be instantly frozen by weapons possessing low temperature attributes. If they latch onto Samus, the only way to dislodge them is by dropping a bomb in close proximity while in Morph Ball form.

The dissimilarities between the breeds begin in the strength of their defenses: while Metroid larvae commonly require being frozen before wounding them with concussive weapons, Tallon Metroids can readily be damaged by any weapon in Samus' arsenal (including the Morph Ball Bombs) without freezing them first, though an extensive amount of firepower is required to simply kill a single one. When frozen, a Tallon Metroid can be shattered by one Missile instead of the usual five. Similarly, a Metroid larva from Zebes can withstand three Power Bombs, but the Tallon-grown breed is obliterated within the first detonation; meanwhile, the original SR388 strain is completely invulnerable to them.

A large Tallon Metroid.

Other differences can be seen in the Tallon strain's physiology, such as its more oval-shaped membrane and the lack of an oral cavity on its underside which, in other breeds of Metroid, seemingly allows them to pull their prey's upper bodies into their insides, thus strengthening their hold. Without a mouth, the Tallon Metroid relies only on its fangs to attach itself onto a target, though its grip remains just as powerful as the other larvae's. Tallon Metroids initially start out small, approximately the size of Samus's Morph Ball form. However, Tallon Metroids are capable of expanding their mass: after absorbing energy from prey or attacks, they will briefly shrink before expanding greatly in size, reaching more or less the size of other larvae seen elsewhere in the series. During this process, the Metroid's body will be enveloped in energy and briefly invulnerable to all weaponry. The Tallon Metroid's fangs will also spasm as the creature shudders erratically. This event has never been seen to occur in other breeds of Metroids.

Dissected Tallon Metroids in the Metroid Processing Room on Pirate Homeworld.

In Metroid Prime 3: Corruption, scans in Metroid Processing on the Pirate Homeworld states that all disparities between Metroid breeds, such as those mentioned in the previous paragraphs, result from adaptions that occur following exposure to different environments, radiations and stimuli. An example of such an adaptation is the Tallon Metroid acquiring a red membrane when imported to planet Aether. There is a possibility that the presence of Phazon in Tallon IV's environment played a role in the creation of the Tallon strain; giving credence to this is the Tallon Metroid's infant stage being able to quickly mature when in contact with the mutagen.

Life cycle[]

The life cycle of a Tallon Metroid differs vastly from a Metroid on its native planet of SR388, the latter which goes through the Egg, Infant, larva, Alpha, Gamma, Zeta, and Omega stages, with a Queen being the sole reproductive member. Metroids such as the Tallon strain who inhabit alien environments are unable to metamorphose past the basic larval form unless exposed to extreme forms of radiation. Space Pirates were largely involved in the creation of much of the Tallon Metroid's life cycle seen below.

Metroid Cocoon[]

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Cocoons are bio-engineered by the Space Pirates in order to sustain and transport numerous Infant Tallon Metroids. Though not a product of Metroids, inhabiting these organic structures appears to be an important step to an Infant Tallon Metroid's survival.

Infant Tallon Metroid[]


Infants have a very underdeveloped appearance. Exposure to Phazon will cause the infants to mature rapidly, reaching the next stage in a matter of seconds. Infant Tallon Metroids are the result of experiments performed by Space Pirates on the mature form, thus they cannot be spawned by older Tallon Metroid individuals.


Tallon Metroid.png

This specific stage is the most frequently encountered form of the species in the Metroid Prime series overall, undoubtedly a result of the Space Pirates' usage of Beta-Rays and/or Phazon which are both capable of multiplying their supply of specimens. Despite being the third stage in the life cycle, Mature Tallon Metroids were the first to exist when Metroid larvae from Zebes and/or SR388 adapted to Tallon IV. There is a probability that Phazon was a contributing factor to the creation of this strain due to the fact that Tallon IV's atmosphere was contaminated to a certain extent by the mutagen.

All Tallon Metroids In Metroid Prime exhibited green membranes while those imported to Aether in Metroid Prime 2: Echoes featured red membranes; the latter's different pigmentation is likely a result of the planet's environment and atmosphere. The Ing, an intelligent and malevolent race from Dark Aether, were capable of creating a unique breed called Dark Tallon Metroids whenever the former fused with Tallon Metroids. In Metroid Prime 3, the Tallon strain was only seen in the form of dissected specimens in Metroid Processing.

As the Space Pirates attempted to exploit them as practical bioweapons and energy sources on several planets, it was discovered that Tallon Metroids were highly responsive to Phazon. This lead to the creation of additional mutants such as the Fission Metroid and the Phazon Metroid; the latter could bypass the jellyfish-like form and metamorphose into other aberrations. Though never confirmed, the highly mutated creature known as the Metroid Prime (and its later form, Dark Samus) likely began its life as a Tallon Metroid. Interestingly, Metroid Prime was capable of spawning Tallon Metroids from the pools of pure Phazon it created. However, these freshly spawned Tallon Metroids, as well as Metroid Prime itself, were highly vulnerable to the Phazon Beam, a weaponized form of the very substance these Metroids adapted to.

Hunter Metroid[]

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A Tallon Metroid can attain a unique, older form known as the Hunter Metroid. Hunters no longer latch onto their targets with their fangs and instead use their new tentacles for long-range attacks. It is unknown if the Hunter stage is the result of prolonged exposure to either Phazon, Tallon IV's environment or a combination of both. Despite possessing a red membrane like a Tallon Metroid adapted to Aether, Hunter Metroids were never encountered on the planet.

Other appearances[]

"What's the matter? All I said was that Komaytos look like little Metr-"

Non-canon warning: This article or section contains information that may not be considered an official part of the Metroid series in the overall storyline by Nintendo.

In Metroid Prime Hunters: First Hunt, Samus practices her skills inside arenas where she battles against different types of Xenomorph holograms, one of which is unmistakably based on the Tallon Metroid breed. They possess the same oval-shaped membrane and can also be destroyed with Samus's standard weaponry.

Tallon Metroids appear as enemies in Metroid Prime Pinball, a pinball adaptation of the original Metroid Prime. They appear on various tables and are the target of the Metroid Mania Mini-Game. Although their official artwork is unmistakably that of the Tallon Metroid strain, their in-game model bears a closer resemblance to generic Metroid larvae.

In Super Smash Bros. Brawl, the Tallon Metroid (simply called "Metroid") is available as a Sticker, using its render from Pinball. It can be applied to any fighter to increase Freezing Attack power in Adventure Mode: The Subspace Emissary.

Non-canon warning: Non-canonical information ends here.


Metroid Prime[]

Metroid Prime 2: Echoes[]

Official data[]

Logbook entry[]

Metroid scanpic.png Metroid scanpic 2.png
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Metroid Prime

Temporary scan

Morphology: Metroid
Energy-based parasitic predator.

Logbook entry

The dominant species of planet SR388, Metroids can suck the life force out of living things. A Metroid will latch onto its prey and drain energy, growing larger as it does. The only way to shake an attached Metroid is to enter Morph Ball mode and lay a Bomb.

Tallon Metroid

Metroid Prime 2: Echoes

Temporary scan

Morphology: Tallon Metroid
Energy-craving parasite.
Taken from planet Tallon IV. Target leeches bioenergy from its victims.
Stunned by concussive blasts, vulnerable to dark energy.

Logbook entry

Space Pirates harvest and enslave Metroids for use in their operations. The Tallon Metroid will latch onto prey with powerful pincers, then proceed to drain its life energy. This causes the creature to grow in size and mass. The creatures are vulnerable to the chilling effect of dark energy, and can be detached by entering Morph Ball mode and deploying a Bomb.

Super Smash Bros. Brawl Sticker[]

Metroid (Metroid Prime Pinball)
[Freezing] Attack + 18 | Usable by: All


  • In the English version, the name "Tallon Metroid" is a retronym from Echoes, since they were simply known as "Metroids" in Metroid Prime. However, in the Spanish version of Metroid Prime (both the original GameCube and Trilogy releases), the Metroid is always called Metroid Talloniano (Tallon Metroid).[1][2]
  • Unlike most of the original Metroid larvae encountered outside of the Metroid Prime series, there are several instances where Tallon Metroids and other mutated strains can respawn after dying if Samus exits and re-enters their rooms. On rare occasions, they will simply keep spawning regardless if she stays within their locations.
    • The original Metroid game on the NES/Famicom is the only entry where the original Metroid larvae respawn in a similar fashion to Tallon Metroids. Coincidentally, both versions also had a red variant (in the Prime series, the ones found on Aether).
  • The theme heard during a Tallon Metroid breach in Metroid Prime, Metroid Battle Theme, is shared with Chozo Ghosts and also used for Phazon Metroids in Metroid Prime 3: Corruption. Similarly, the theme heard during a Tallon Metroid breach in Echoes, Short Battle, is shared with numerous Darkling creatures.
  • In NTSC GameCube versions of Prime, a special type of Tallon Metroid existed in the Glacier One base known as a Metroid: Alpha Type. These appear to be standard Tallon Metroids with more HP, faster movement and have less time frozen. Based on the scans and Pirate Data revealed throughout the base, it is quite possible that these Metroids were the Pirates' earliest known attempts at creating and weaponizing Unfreezable Metroids (before being retconned).
  • Very curiously in Metroid Prime, standard green Tallon Metroids are completely immune to the Phazon Beam outside of the Metroid Prime battle (seen via hacking). Every other Tallon Metroid encountered in Tallon IV outside of the Metroid Prime battle does receive damage from the Phazon Beam, whereas all Metroids spawned by Metroid Prime can be killed in one shot by the Phazon Beam. It's very likely that the green types of Tallon Metroids grew a more natural immunity towards the substance than other Tallon Metroids due to prolonged exposure, though it could also be the chaotic nature of Phazon itself that has left other types of Metroids less tolerable towards the substance during growth. This could be hinted by the abundance of green Tallon Metroids dwelling inside the Phazon Mines. As for the freshly spawned Metroids encountered during the Battle with Metroid Prime, it is possible that these Metroids have not had time to fully develop a tolerance to the substance yet and are thus easily disposed of with a single shot of the Phazon Beam.
    • Ironically while being immune to the Phazon Beam, a standard Tallon Metroid (outside of the Metroid Prime battle) is vulnerable to any other beam weapon, a trait that is similarly shared with Metroid Prime. Unlike Metroid Prime however, a Tallon Metroid doesn't deflect Phazon Beam shots.
    • It is unknown if the Tallon Metroids from Echoes were immune to the Phazon Beam, as the beam wasn't present on Aether and a different version of the weapon was made available (via hacking).