No, Taumoeba is not the fuel for Ryland Grace’s spaceship. The fuel is Astrophage, a microorganism that stores huge amounts of energy and powers the ship’s propulsion. Taumoeba is a different microorganism that feeds on Astrophage, which threatens the fuel supply by consuming it, but Taumoeba itself is not used as fuel.
Sources
Recapy curated
Tap to read source excerpt