Disclosed is a live bait keeper having a cornerless interior and dynamic flow of ambient water through it for freshening the water and protecting bait against harm when the holder is in water. The holder has a hollow, disc-shaped keeper body having forward and aft ends and cornerless interior space. The keeper is buoyant. A top hatch accesses the interior where bait is held. In use, ports on the top-portion of the keeper vent air and water from the interior, and bottom-ports disposed toward the forward-end of the keeper allow water to enter the interior. A tether attachment is disposed on the bottom-portion at the forward end below the neutral buoyancy plane of the keeper body, and as a tether maintains the forward end into the wind and/or current, the keeper rocks fore and aft forcing water into the bottom-ports to provide dynamic water flow into the bait holder.