"New xenotype created by Dominion scientists."
- Pygalisk description(src)
The pygalisk is a "baby" version of the ultralisk. Engineered by the Terran Dominion, large numbers of them were held as lab specimens in the Castanar installation.
A number of them emerged from cocoons as Raynor's Raiders fled from a powerful hybrid in an effort to escape the installation. At least one ultralisk supported them.