An order of ray-finned fish, also called the Microcyprini, and comprising mostly small, fresh-water fish. They are closely related to the Atheriniformes[?] and are occasionally included with them. Many popular aquarium fish, such as killifish and live-bearers, belong here.
... when the precession of the gyroscope is supported and amplified by wrist motion.
It takes a while until one finds the "rolling" point, but the gyro will also b ...