Why do some fish eat their own eggs?

Many animals go to great lengths to ensure the survival of their offspring - yet some species actually eat some or all of their babies. Nor is there always an obvious explanation – like a food shortage – for such filial cannibalism. Martin Vallon and Dr. Katja Heubel of Tübingen's Institute of Evolution and Ecology have now investigated personality differences between individuals which may play a role in species which practice filial cannibalism. They observed the Common Goby &n