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Common Ground News

How long does it take for a fish fry to grow?

Author

James Craig

Updated on February 21, 2026

How long does it take for a fish fry to grow?

If you feed 3-4 small meals a day, they will grow faster. Guppy fry can mature in a few months, but most live bearing species take about six months. Egg laying fish like angelfish take the best part of a year to mature sexually, and they continue growing so long as they are healthy.

Similarly, you may ask, how long does it take for Molly fry to grow?

around one to two months

One may also ask, how fast do baby fish grow? approximately 4 to 6 weeks

Beside above, how long before I can put baby fish in my tank?

about 8-10 weeks

How do you raise a baby fish successfully?

The fry should be fed a quality food, such as baby brine shrimp, baby fish food, or quality flake food ground into a fine powder. Feed the fry small amounts several times a day. Maintain good water quality by performing regular water changes.

How often should you feed fry?

Some people say to feed them 4 times daily for a week when they are first born, but I feed mine 2 times a day with the first bite food.

How do you raise a baby fry?

Raising Fry
The fry should be fed a quality food, such as baby brine shrimp, baby fish food, or quality flake food ground into a fine powder. Feed the fry small amounts several times a day. Maintain good water quality by performing regular water changes.

How many guppy fry will survive?

Once the fish has got pregnant once she will keep having fry every 2 to 7 months. This is only with platies, mollies and guppies as they are the only livebearers, any other fish will lay eggs and maybe 5/50 will survive as the eggs float about and often get eaten. just pointing out, swordtails are livebearers too.

How long should fry stay in breeder box?

If you do use a breeder box, remove the fry after a week — two at most. Unless you have some really large fish in the community tank, the fry should be large enough at one week to not fit in the others' mouths. If they feel they're in danger, they'll hide.

Will Molly fry survive in main tank?

The most likely way they will survive, is if you have some dense plants(real or fake) in the tank for the fry to hide in. ALL those fish are a threat to the fry apart form the pleco and corys.

What Colour will my Molly Fry be?

Well molly fry tend to be any color they want to be or close to that of the parent. Yours are dark grey but as they get older will start to change color so do not worry.

How often should you feed Molly Fry?

3 times a day

Will my Molly fry survive?

The most likely way they will survive, is if you have some dense plants(real or fake) in the tank for the fry to hide in. ALL those fish are a threat to the fry apart form the pleco and corys.

Can I keep Molly Fry in a bowl?

A five gallon bowl with a filter may hold a few Molly fry for a few weeks, but small aquariums with large biological loads are difficult to manage. If you want to raise some live bearing fry, add lots of bushy, floating plants for them to hide in.

How many fry can a Molly have?

Your mamma could have as little as 1 fry to 200 depending on her age. It will vary alot, I had one give birth to 197 babies and her sister of the same age only have eight two days later.

Why are my Molly Fry dying?

Everyday 2-3 of them fall to the bottom and its as if they they're tails are stuck striaght and they can't move them. Their gills move and sometimes they flap their side fins. Once they reach the laying on the bottom of my breeding net stage, they always die.

What do Molly Fry eat?

Baby mollies can eat your regular fish flakes, crushed finely. Live baby brine shrimp are also a popular baby food. Do not overfeed them. In about eight weeks your baby mollies should be large enough to go into the tank with the other fish.

How do I know when my Molly is going to give birth?

Look for the gravid spot on the fish's abdomen near the rear tail. The spot should appear large and dark when her eggs are fertilized. You will know your fish is close to giving birth when the spot becomes nearly black. Some fish may show white spots instead of black.

Will baby fish survive in my tank?

If you find baby fish in your tank, don't panic! The first thing you should do is remove any adult fish so they do not eat the babies or move the baby fish to a separate tank where they can grow in safe environment. To transfer baby fish, scoop them up carefully in a cup rather than using a net.

Can baby fish survive without their parents?

Caring For Baby Fish
For many species, it's important to keep fertilized eggs and newly hatched fish, or fry, separate from the adults. Some fish eat their own young while others eat the young of other species. Fish who were born via live birth traditionally are better off being separated from their parents.

What do you do with baby fish you don't want?

AC Members
  1. Hope that the parents or other tankmates eat the babies.
  2. Sell/Donate the babies to the LFS once they've grown a bit.
  3. Give them away to friends or local hobbyists.
  4. Buy more and more tanks to house your constantly breeding guppies until you are known by your peers as "that weird fish kid."

Should you separate baby fish?

If you find baby fish in your tank, don't panic! The first thing you should do is remove any adult fish so they do not eat the babies or move the baby fish to a separate tank where they can grow in safe environment. To transfer baby fish, scoop them up carefully in a cup rather than using a net.

How big should fry be before releasing into tank?

Size. Before you can move your baby guppies into your big tank, they need to be large enough that the other fish won't eat them. Exactly how large depends on the size of the fish in the main tank, but the minimum size the babies should be before you move them is about an inch long.

How do you know when fish are pregnant?

The area where a pregnant guppy's abdomen meets the tail is sometimes called the "gravid patch", or "gravid spot". When pregnant, there is a slight discoloration that slowly darkens as the guppy progresses through pregnancy.

Do baby fish need air pump?

Guppies are one of the hardiest tropical freshwater (and even saltwater!) fish you can keep. But they can't breathe air, so they need well-oxygentaed water, like most fish. If you have a filter with the output stream close to the surface, or with an output that breaks the water surface, an air pump is not needed.

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