Abstract: Embodiments described herein relate generally to systems and methods for transferring, grading, and/or harvesting aquatic animals. In some embodiments, an apparatus can include a vessel configured to facilitate access to aquatic animals contained in an aquaculture system, a grading system disposed on the vessel and configured to receive a plurality of aquatic animals and sort the aquatic animals based on a characteristic, and a return system disposed on the vessel and configured to transfer at least a portion of the plurality of aquatic animals back to the aquaculture system.