Planet of Origin: Antede III
Species of fish-like humanoids. They are able to enter catatonic state for long period of time, although this requires them to eat large quantities of food before and afterward. As of the 24th century, they had developed an highly advanced civilisation but had not really ventured into space as they found the spaeflight experience to be extremely traumatic.
Source: Star Trek Universe: Star Trek: TNG: "Manhunt”