Despite their slow speeds, and simple bodies, apple snails (Pomacea canaliculata) have eyes that are anatomically similar to human eyes. Unlike humans, apple snails can regrow their peepers if they are injured or amputated. Jill ToyoshibaMeet the apple snail and their amazing eyesIn parts of the United States, apple snails are considered an invasive species. It takes apple snails about 28 days to regenerate their eyes, from the initial amputation to full restoration. Beyond just eyes, apple snails could also serve as a model organism for studying tissue regeneration.