See a one-minute video of our Autonomous Biological System (ABS) on ISS with cosmonaut Yuri Gidzenko. The ABS lived on the wall of the Zvezda module for over 18 months, becoming the longest life-science experiment in space, and producing the first animals to go through multiple generations in space.
(2.6 MB)

See Japanese Medaka fish during a parabolic flight, which simulates microgravity. One fish uses its eyesight to orient itself, and thus does not respond to the absence of gravity. The other fish spins out of control. It uses its inner ear to orient itself, which becomes confused as gravity disappears.
(2.25 MB)