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Feeding Egg Yolk to Fish Fry

Ever wake up one day, take a look in your tank and see a horde of tiny little baby fish that weren’t there the night before? Did you have to run out in search for something to feed the new little fish? Here’s a quick and nutritious solution that you probably already have on hand…egg yolk! Yep, normal old chicken eggs that are probably already in your refrigerator. Just hard-boil an egg and remove the yolk (you won’t need the white, feel free to munch on that while you prepare the fishes’ portion). Put a small piece of the yolk in a small container of water and shake it up until the yolk is completely suspended in the water. You may want to break it up a little before you start to get a headstart but if you still notice larger chunks in the water that haven’t broken up enough, you can strain the mixture through cheesecloth or a coffee filter to get rid of the bigger pieces. Once the yolk is suspended in the water, just add a little to the tank with the fry. It’ll make the water a little cloudy so you don’t need to add much and you can save the mixture for a few days in the refrigerator.

Quick, easy, and healthy for just about any small fish fry!

23 comments

  1. avatar

    Thats very interesting. I have around 30-40 Demasoni fry and noticed they are very sensitive to most high protein food. I feed them mostly spinach, pees, carrots and garlic mixed together in a blender to a fine paste.

    Thanks for the tip. I think I will try it. 🙂

  2. avatar

    how much egg yolk do you mix and how much to feed a nd hpw to store it

  3. avatar

    You can mix as much yolk as you need depending on how many fry you are feeding and how often. Use a small plastic container to mix and store it in the fridge for up to a week.

  4. avatar

    How much water do I add

  5. avatar

    Just a little, maybe a teaspoon for a pea-sized piece of yolk. You want the particles of the egg yolk to be suspended in the water and small enough for the fry to consume.

  6. avatar

    woooow thanks,will this make my fry grow faster? oh and is it okay to also feed my fry with the normall fish food?

  7. avatar

    Healthy fish will grow more quickly than unhealthy fish. Egg yolks are rich in vitamins and nutrients which will benefit most fry, along with proper maintenance and water quality. This can be used as part of your fry diet and along with other foods that you may be feeding, but is no “magic bullet” that will make them grow large overnight.

  8. avatar

    Is there anything that I can feed my catfish with or do, such that 3 month from the time of purchase as fingerlings they can attain a size of 1kg. I have a friend who does achieve this but not ready to reveal the secret to anyone. Pls help.

  9. avatar

    Hello Kevrick, What type of catfish are they and how are they being housed? There aren’t many within the aquarium trade that grow to 1kg and without knowing what type of catfish you are referring to, it is difficult to say what kind of diet they would need..

  10. avatar

    i have a saltwater fish fry, what to feed this baby fish

  11. avatar

    Hello sreenu, It would depend on what kind of fish they are. You can try egg yolk like explained here or crushed up flakes but most saltwater fish that can be bred in home aquariums will need live foods like newly hatched brine shrimp, copepods or rotifers.

  12. avatar

    Hello, could you please help me to know the reply of the following questions:

    (1) How many times/day can I feed my Gold fish newly hatched fry with boiled chicken egg yolk?

    (2) What exactly the amount of egg yolk/time? Is it pea size or lentil size/tea spoonful?

    (3) How many water needed to dissolve a half of egg yolk, and what is the dose (ml/liter of aquarium water) of this
    solution which is needed/ one time ?

    (4) How can I change the water for the Fry? Is it necessary one time /day or one time /week?

    (5) How long does refrigerated egg yolk solution in water spoil.

    Many thanks,and my best regards

    Mona Ramzi

  13. avatar

    Hello Mona,

    1) The fry should be fed small amount 2-3 times a day for the first couple weeks.
    2) and 3) That would depend on how concentrated you make your mixture (how much water you add to your yolk). There is no exact measurement for this method that I can give you but for a rough estimate, a ratio of 1 part yolk to 3-4 parts water should give you a good concentration. The amount to feed at a time depends on how many fry you are feeding. Feed a little bit at a time and watch the fish as you feed; as with adult fish, feed only as much as they will eat in about 5-10 minutes.
    4) That would depend on what type of filter you have, how many fry you have, the volume of water and the water quality. You can use a cup or small siphon tube to remove the water.
    5) A mixture should last a few days in the refrigerator. If it smells badly or like rotten eggs, dispose of it.

  14. avatar

    Thank you very much, My best regards.

  15. avatar

    can catfish fry feed on egg yoke, when will I start giving the fry egg yoke after hatching and won’t the yoke desolved in the water ,

  16. avatar

    Hi Jonathan, It would depend on the type of catfish and size of the tank. A method like this is best in a smaller system where the food concentration is higher so the fry can find it easier. As stated in the blog, you would want to suspend the egg yolk in the water. For a bottom-feeder like catfish, a sinking pellet like shrimp pellets would be better to help them find the food easily. Most fry will need to be fed once they are free-swimming.

  17. avatar

    hallow, am seriously interested in aquaculture and successful to have a laboratory special for artificial propagation of African catfish and am now producing the fingerings but I met with different challenges and I experienced from it, the issue of feeding is seriously confusing in these activity, let me ask for the help some tell me if w’l get Artemia eggs and produce Artemia fries then feed them to my fingerings(African catfish) I w’ll run from this challenge how can you help me for this and if its possible how can I get Artemia eggs

  18. avatar

    Hello Ignas, Artemia, aka Brine Shrimp, eggs are commonly available from most pet stores. You can find the selection of them that we sell on our website (click here).

  19. avatar

    do newly hatched fries move like worm? because mine moves like that

  20. avatar

    Hello ewaski, Fry will usually move like the parents but it depends on what animal’s fry you are referring to.

  21. avatar

    What can I do?l my newly fries refuse to pick feed.

  22. avatar

    Hello John, What are you trying to feed and what food have you been trying?

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About Eileen Daub

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Marine Biologist/Aquatic Husbandry Manager I was one of those kids who said "I want to be a marine biologist when I grow up!"....except then I actually became one. After a brief time at the United States Coast Guard Academy, I graduated from Coastal Carolina University in Myrtle Beach, South Carolina in 2004. Since then, I've been a marine biologist at That Fish Place - That Pet Place, along with a Fish Room supervisor, copywriter, livestock inventory controller, livestock mail-order supervisor and other duties here and there. I also spent eight seasons as a professional actress with the Pennsylvania Renaissance Faire and in other local roles. If that isn't bad enough, I'm a proud Crazy Hockey Fan (go Flyers and go Hershey Bears!).