(Meta description: Common goldfish feed on everything. As long as there is food in front of them, they simply eat. To avoid overfeeding your fish, check the rules and types of feed first.) Looking after common goldfish may seem easy, but also tricky. For starters, we need to decide the environment they can be in. You can let them stay in the natural pond outdoor or an aquarium. Besides that, you also need to consider what your goldfish can eat. So, what are the types of feed that can be given to common goldfish? Common goldfish feed on not just anything. Plus, there are some factors to consider. The Common Goldfish Behavior When it comes to these fish, they can be such opportunistic creatures. As long as there is food in front of them, common goldfish feed on and on. If you are not careful, you may overly feed them that they can die from digestive problems and even death by suffocation. The clue: only feed them twice or three times a day. This can also reduce the contamination in the a...