Tholian

The Tholians are an extremely xenophobic, non-humanoid hermaphroditic species with a propensity for precision. They first appear in the original series episode, "The Tholian Web", where Spock remarks when fired upon by the Tholians: "The renowned Tholian punctuality". Tholian biology required high temperatures around 480 Kelvin (207 °C, 404 °F). They could tolerate lower temperatures for a brief period; if they were exposed to temperatures around 380 Kelvin or less, their carapace would crack. This was painful or distressing; a Tholian subjected to such a temperature regime could be coerced to cooperate. In temperatures even lower, a Tholian would freeze solid and shatter. (ENT: "Future Tense", "In a Mirror, Darkly")