User:CIA391/Sandbox10

Below is a list of unidentified alien species in the universe and where they were spotted.

Overview
There was many species that exist, though many Confirmation other species exist: Canon Fodder: Bulkhead Banter

CHeeeezyy: Are there any other kind of sentient beings (as like if they knew how to make tools and stuff) in the Milky Way galaxy?  A: The short answer is yes, the Forerunners indexed and reintroduced many sentient species into the Milky Way galaxy. The longer answer is that only a fraction of these species have gone on to build tools or achieve even Tier 7 (preindustrial) signature technologies in the millennia following the firing of Halo; of those, only a handful have been encountered by humanity in the Orion Arm region of the galaxy. In fact, not even every species that fell under the yoke of the Covenant have been contacted and catalogued by the UNSC, as the Prophets did not deign many worthy of trading service for salvation within their fleets and the Sangheili kept few records of civil affairs.''

Number of catalogued species: Halo Silentium - Page 18

"But as Catalog I am aware that she has studied and favored one hundred and twenty-three technologically capable species across three million worlds within the explored regions of our galaxy. How many of these she will seek to preserve, it is not my job to predict or even to understand."

At least a total of 123 sapient species existed in the Forerunner ecumene

Installation 04
Halo Installation 04 was the location of numerous alien arrivals prior to the arrival of the Covenant and Humanity. Starting with having a Unidentified alien vessel crash land in Sector 1215 around 40,000 BCE an alien vessal crash landed on it, with 343 Guilty Spark trying to contact it and failing.

Following the crash, numerous species had visited the ring, recording what they see and leaving.

Delta Halo
Halo Installation 05 had potential outside meddling that lead to the formation of the Gravemind on the ring.

System of Miasmic Giants
In the System of Miasmic Giants, there was a species that nearly destroyed the Sangheili 'Creckas ship. They did not speak the Sangheili language.

Nethrop aliens
Halo Oblivion - Need to expand

Unknown Location (Security spire)
A unidentified inhabitant was kept in a Forerunner Security spire before it escaped.