Many laboratory experiments have shown that O. joubini prefer to remain hidden or, in the case of a tank environment, close to the sides of the enclosure. This behavior is presumably for protection against outside predators, though no literature describes specific predators of the O. joubini.
Many laboratory experiments have shown that O. joubini prefer to stay hidden or, in a tank setting, near the enclosure's sides. This behavior is likely an adaptation for protection against external predators, though there is no research documenting the specific predators of O. joubini.