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This character exists primarily within the Sonic X continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.

Eoismias is a creature mentioned in the anime series Sonic X. It was a genus of animals that lived on Earth in prehistoric times.[1]



Reports state that the Eoismias species was extremely small, being only the size of a human finger. They also possessed feet and bones.[1]

Characteristics and culture

It is theorized that the Eoismias species was nocturnal, only sleeping during the day and searching for food in the treetops during the night. They also only ate insects and fruit.[1]



According to reports, the Eoismias were creatures whose existence led to the development of apes, monkeys, and humans. They supposedly lived 45 million years ago in tropical jungles in an unspecified country. Over fifty years go, evidence of the Eoismias' existence were found by scientists. The research on the creatures were used during Project Shadow, although it is unknown what role it played.[1]


  • The Eoismias is based on the real-life prehistoric genus.
  • The Eosimias was never mentioned in the English dub of Sonic X; the lab report providing the information on the Eosimias had all its text changed to black blocks in the English dub.


  1. 1.0 1.1 1.2 1.3 1.4 1.5 Yoshimura, Kiyoko (14 December 2003). "Robotnik's Revenge (Japanese dub)". Sonic X. Season 2. Episode 37.