The environment of Nahen IV is such that Obet were constantly beset by predators, particularly the closely-related darorwo. This has led to the development of a number of natural defenses against predation, many of which the Obet have conscious control over.
Firstly and most infamously, Obet are capable of generating slime of varying viscosity which can allow them to wriggle free of potential danger. The biological process is similar to the hagfish on Sol III; the Obet releases polymers that react with nearby liquids or atmospheric moisture to generate any quantity of ooze desired. Unlike hagfish, the Obet have the ability to control several aspects of their generated slime, including its viscosity, color, adhesion, and more. With some practice, most Obet can–and many do–create slime “hair” of a high viscosity and adhesion that will stick to their heads, as a fashion statement.
One of the factors Obet can control is how toxic the resulting ooze is–at least to the other native organisms of Nahen IV. The toxins have a variety of effects on other sapients, with no effect whatsover on the Zypger, a mild rash for Fulvans, a gentle tingling for Humans, and intense stimulation for the Vatna. The highest toxin levels can be fatal to darorwo and even some other Obets, particularly those from other clans, and are therefore rarely employed on Nahen IV, seeing more use among Obet living off-world.
While most adult Obet have full control of their secretions, when profoundly shocked, intoxicated, emotional, or otherwise in an altered state of consciousness, Obet will sometimes slime on instinct. Most regard this with intense embarrassment, much as a Human would regard offensive body order or involuntary urination, but inadvertent sliming is also a key aspect of transgressive Obet humor, and one of the most popular subjects for stock Obet characters in fiction.