Silver Age Beyond
An alien organism found only on the gas giant Magog in the Capital Secundus system, they are harvested for the neurotoxin in their nervous systems. This produces jelly viper toxin, which is highly sought after by assassins in the Galactic Imperium.
Neurotoxins are toxins that are poisonous or destructive to nerve tissue (causing neurotoxicity). Neurotoxins are an extensive class of poison that can adversely affect function in nervous tissue, causing dizzyness, paralysis and eventual death if the exposure is too great.
Jelly viper toxin is notoriously difficult to detect, as it very quickly breaks down into what looks to most medical inquiry like the results of the very same neurological damage that it caused in the first place.