Anaphasic energy was the energy produced by anaphasic lifeforms such as Ronin. That form of energy was extremely unstable and needed an organic host to maintain molecular cohesion.

In 2370, anaphasic energy was detected in Ned Quint's body, who had been killed by Ronin. Residuals of anaphasic energy were also observed in the weather modification network of Caldos and then in Felisa Howard's corpse, where it extended to the cellular level. Ronin, inhabiting the corpse, then used the body to knock out both Data and Geordi La Forge with a zap of anaphasic energy; the two later recovered from their exposure. (TNG: "Sub Rosa")