Abstract: A device to cover live wells or other holding containers to retain fish and other aquatic animals. The cover has a plurality of flexible, resilient strap-like web members spaced apart in parallel and connected at at least two ends to a border. The cover may be attachable to the side of the container of a live well by various fastening means, such as hook and loop material, adhesive tape or hooks. One embodiment of the live well cover is provided with tubular members filled with foam so that it can float flush with the water in the live well, thereby requiring no attachment means to the live well whatsoever. This device prevents fish from escaping from a live well, yet allows them to be readily retrievable for weighing and cleaning.