Goldfish fry or baby goldfish need special attention when it comes to feeding during their first few weeks. So what do goldfish fry eat?
Although they can eat finely crushed adult goldfish food once they are able to swallow it, nutritious starter foods rich in protein are important for healthy growth.
Once they are free-swimming, you can feed them crushed hard-boiled egg yolk, tiny foods like infusoria, freshly hatched baby brine shrimp, or a quality commercial powdered fry food.
As the fry grow, their nutritional requirements and the size of food they can eat gradually change.
Quick Navigation:
1) The First 2 Days After Hatching: No Food Needed
2) What to Feed Goldfish Fry, Week by Week
3) How Often to Feed Baby Goldfish
4) What Do Goldfish Fry Eat in a Pond
5) Frequently Asked Questions
The First 2 Days After Hatching: No Food Needed
For roughly the first 2 days after hatching, goldfish fry do not need food. Many of them remain attached to a surface and don’t move much. They are still absorbing their yolk sacs and are not yet ready to eat.
Trying to feed them during these first 2 days only pollutes the water, since nothing gets eaten.
Once the yolk sac is absorbed, usually within 1–3 days after hatching, the fry begin swimming freely and searching for food. That’s when you should start feeding them.
What to Feed Goldfish Fry, Week by Week
Goldfish fry have very small mouths, so their food must be small enough to fit into their mouths. As they grow, you can gradually increase the size and variety of their food.
The following feeding schedule is a general guide:
Week 1: First Foods After Hatching
Once the fry have absorbed their yolk sacs and become free-swimming, you can start offering these foods. These are different feeding options, so you don’t need to feed all of them. Choose what is available and suitable for the size of your fry.
Infusoria: These are microscopic organisms and are suitable for newly free-swimming fry. You can culture them at home or use a commercially available infusoria starter kit to culture them.
Newly hatched baby brine shrimp: A nutritious, protein-rich live food that encourages feeding. Offer them once the fry are large enough to swallow them.
Egg yolk: Crush a small amount of hard-boiled egg yolk, mix it with water, and feed a few drops using a dropper. Use very small quantities because uneaten egg yolk can quickly pollute the water.
Decapsulated brine shrimp eggs: These are shell-free brine shrimp eggs that are available from aquarium shops and online stores. They don’t need hatching. Simply soak them according to the manufacturer’s instructions and feed small amounts to fry that can swallow them.
Commercial starter powder: Specialized powdered fry foods, such as Hikari First Bites, are another option. Choose a fine powder suitable for the size of your fry.
Try to feed 2 to 3 small meals a day. Clear out anything uneaten, as water quality is very important for the fry.
Week 2: You Can Add More Variety
Continue feeding the foods that worked during the first week. As the fry grow, you can introduce a few additional options.
Vinegar eels: These tiny live worms are easy to culture at home and small enough for young fry to eat.
Small Daphnia: Young or small Daphnia can be offered once the fry can handle them. Use a clean, trusted culture because wild-collected live food may introduce unwanted organisms, including hydra.
Continue offering small, frequent meals and remove any uneaten food.
Week 3: Introducing Larger Foods
By the third week, many goldfish fry can handle slightly larger foods. You can continue feeding their usual foods while gradually introducing finely powdered goldfish flakes or pellets and small amounts of soft vegetables.
Finely crushed flakes or pellets: Crush good-quality goldfish flakes or pellets into a fine powder that the fry can easily swallow.
Soft, blanched vegetables: Very finely mashed spinach or cooked, deshelled peas can be offered in small amounts.
Continue feeding small, frequent meals and monitor water quality.
Week 4: Moving Towards Juvenile Food
By the fourth week, many goldfish fry can handle slightly larger portions of food. Continue offering a good diet and gradually increase the food size as they grow.
You can also introduce small portions of suitable gel foods, such as Repashy Super Gold, prepared soft and broken into tiny pieces, as well as live or frozen bloodworms and crushed goldfish pellets or flakes.
By around 6–8 weeks, many fry can eat the same types of food as adult goldfish, though smaller or slower-growing fry may need more time.
Growing goldfish fry benefit from a protein-rich diet, with roughly 35–40% protein when choosing commercial fry food. A balanced diet should also contain fats, vegetable-based ingredients, vitamins A, D, and E, and minerals such as calcium and phosphorus to support healthy growth. Good nutrition helps bring out their best natural coloration.
Make sure you maintain good water quality throughout their growth.
How Often to Feed Baby Goldfish?
Goldfish fry need frequent feeding during their first few weeks because they grow rapidly. Aim for 3–5 small meals a day if possible, although 2–3 meals can also work with adequate nutrition and careful monitoring.
Offer only small amounts at each feeding and remove any uneaten food, as it can quickly pollute the water in a fry tank.
What Do Goldfish Fry Eat in a Pond?
Goldfish fry raised in an established pond have access to natural food that you would otherwise need to provide in an aquarium. A mature pond usually contains plenty of tiny organisms that growing fry can feed on.
Some of their natural food sources include:
Algae and biofilm: Fry can graze on microscopic algae and organisms growing on rocks, plants, and pond surfaces.
Zooplankton: Tiny aquatic animals such as Daphnia, copepods, and seed shrimp provide natural food for growing goldfish fry in ponds.
Microscopic organisms: Infusoria and other tiny organisms found in mature pond water are particularly useful for newly free-swimming fry.
Insect larvae: As the fry grow larger, they may begin eating small mosquito larvae and other aquatic insect larvae.
Organisms around decaying plants: Decomposing plant material supports microorganisms that fry can feed on.
A well-established pond with plenty of natural food can support growing goldfish fry without constant supplemental feeding. However, if the pond is new or heavily stocked, you need to offer additional food.
Frequently Asked Questions
What happens if goldfish fry don’t get enough food early on?
Goldfish fry that don’t get enough food may grow slowly, become weak, or struggle to compete with faster-growing siblings. You may also notice a big difference in size between fry from the same batch.
How long can goldfish fry go without being fed?
Once they are free-swimming and feeding, goldfish fry should not be left without food for long. Unlike adult goldfish, they are growing rapidly and have limited energy reserves. If you are going away, arrange for someone to feed them regularly or use a food timer device to feed them.
How do I know if I am overfeeding my baby goldfish?
Uneaten food collecting at the bottom of the tank is one of the clearest signs. Cloudy water or a film forming on the surface can also indicate excess food breaking down. Remove leftovers and test the water regularly to prevent ammonia buildup.
Is baby brine shrimp alone enough to raise healthy goldfish fry?
Freshly hatched baby brine shrimp are highly nutritious and can support early growth. However, offering other suitable foods alongside them provides more variety and helps maintain a balanced diet as the fry grow.