Alien: Earth: All the five Alien species, explained

The world of Alien: Earth has shaken up the classic Alien franchise by adding not just one monster but five terrifying alien species, each with its own strange biology and horrifying survival tactics. The nightmare begins when the USCS Maginot, a research ship from the company Wand Utani, crash-lands on Earth.

Locked inside were five alien specimens that had been hidden away for over 65 years. One of them was the infamous xenomorph, but the other four are brand-new creations that push the franchise into fresh, terrifying directions.

The Maginot’s mission was clear: Study alien life from across the galaxy. But by keeping these creatures captive for decades, the crew accidentally unleashed something far worse, a nightmare that now threatens Earth itself.

In most Alien films, the focus is always on the xenomorph. But here, we see a bigger picture of alien biology. Each species has its own ecological role, from blood-sucking parasites to body-controlling manipulators, and together, they create a chilling new chapter in the Alien universe.

Keep reading to know about the Alien species in Alien: Earth

Alien: Earth: Five Alien species explained

Species One: The Xenomorph

We already know these monsters, the ultimate predators, since Ridley Scott’s original film in 1979. Their life cycle remains one of the most disturbing in science fiction:

Egg (Ovomorph) releases a Facehugger
Facehugger implants an embryo into a host
The embryo becomes a Chestburster
The Chestburster grows into a full Xenomorph adult

Depending on the host, variations appear, like the dog-like runner in Alien 3. Queens lay new eggs, creating endless cycles of horror:

Acidic blood that burns through metal
Elongated, eyeless heads that give them a nightmarish look
Deadly tails and inner jaws for quick kills

Xenomorphs are stealthy killers stalking their prey silently before striking. They seem to enjoy playing with their victims, blending intelligence with cruelty. In Alien: Earth, new details make them even scarier:

They might sense fear by detecting human pheromones.
Facehugger larvae resemble tadpoles, showing a deeper biology.
They may even have their own language, though this is still unclear.

Species Two: Species 19 (The Parasite)

Species 19 looks like giant parasitic ticks. They feed by sucking a host’s blood until nothing remains but a shriveled corpse. If no living prey is available, they will even feed on the dead.

Reproduction:

They release tadpole-like offspring into water.
These offspring enter a living host’s veins or arteries.
They feed until they burst out of the body in gruesome fashion.

Defenses:

Can release poison gas that makes victims bleed from the eyes and suffocate.
Spin web-like structures, though their purpose is still a mystery.

Unlike simple parasites, Species 19 are highly intelligent. They have been seen working together to trick humans, making them a blend of parasite, predator, and strategist; a truly horrifying combo.

Species Three: T. Oelus (Species 64)

T. Oelus is perhaps the strangest. Picture a giant floating eyeball with tentacles. Its horror lies in its ability to control living hosts.

How does it work?

It burrows through the victim’s eye socket.
Attaches to the optic nerve and brain.
Completely controls the body like a puppet.

Abilities:

Can control cats, sheep, and even humans.
Smart enough to escape containment on its own.
Once, it even fought a full-grown xenomorph while inside a human host.

What makes this species in Alien: Earth unique is that it might not be purely evil. At one point, it even warned a human scientist about danger from another alien. Its motives are mysterious, as it could be an enemy of the other aliens, or even a possible ally to humans.

Species Four: D. Plumbicare

This alien looks like a giant hanging plant pod with a long, vine-like appendage. But don’t be fooled, it is a carnivorous predator. It lures prey close with its appendage and pulls them into its pod-like body. The victims die inside through suffocation, exhaustion, or digestion.

Some scientists in the series wonder if it is even a plant at all, suggesting it might be an animal disguised as one. For now, its full nature remains a mystery.

Species Five: The Beetle-Like Creature

The least explored of the five, these beetle-like aliens only appear briefly. They look insect-like with retractable wings and might be able to fly. Their true potential is unknown. Some believe they can spit acid, while others think they might swarm in large numbers. Either way, their presence adds another layer of danger.

Each alien in Alien: Earth has a unique role, making Earth a terrifying hunting ground:

Xenomorph: Apex Predator
Species 19: Blood Parasite
T. Oelus: Manipulator / Body Controller
D. Plumbumberare: Plant-like Trapper
Beetles: Unknown Insectoid Threat

By introducing these new life forms, the series Alien: Earth shifts focus from just the xenomorph to an entire alien ecosystem. This opens up endless storytelling possibilities, making the universe feel bigger and scarier.

Fans are both terrified and thrilled about Alien: Earth. Many are excited to see the Alien universe expand, while others debate how these new species connect to older films like Prometheus and Covenant.

With five unique alien species, Alien: Earth has taken the franchise into bold new territory. From bloodsucking parasites to mind-controlling eyeball monsters, this series shows us that the xenomorph is just one piece of a much larger nightmare. If these five creatures are only the beginning, then humanity’s future in this universe looks darker than ever.