In most fish families, after the mother has laid the eggs and the father has fertilized them, the eggs are left on their own. But there are exceptions, such as the seahorse, stickleback, tilapia, Kurtus nursery fish, pipefish, bullhead catfish and some others. Not only are the eggs cared for by a parent but - surprise - that parent is the father. This may sound strange but it is the truth. ...