History:
Life-forms from a two-dimensional continuun. A group of these creatures entered our continuum in 2367 and were discovered by scientists aboard the Enterprise-D. The creatures were described as resembling bioluminescent plankton, floating freely in instellar space, much as fish swim in Earth's oceans. The presence of the life-forms also caused the temporary loss of Deanna Troi's empathic powers. The creatures, attempting to return to their own space through a cosmic string fragment, had apparently lost their way until Enterprise-D personnel used the ship's main deflector to gnerate the appropriate subspace harmonics to guide their return.
TNG "The Loss" ; Star Trek Encyclopedia II
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