Feeding Baby Fish (Fry)

Quick Answer

When feeding baby fish (fry), provide tiny, nutritious foods several times a day because they grow rapidly and have very small stomachs. The best first foods depend on the species but commonly include infusoria, microworms, vinegar eels, powdered fry foods, and newly hatched baby brine shrimp.

At a Glance

Diet: Species dependent

Best First Foods: Infusoria, baby brine shrimp, microworms

Feed: 3–6 small meals daily

Growth: Very rapid

Most Important: Excellent water quality

Why Feeding Fry Is Different

Baby fish are not simply miniature adults.

They:

Grow extremely fast
Need frequent meals
Require tiny foods
Cannot go long without eating
Are sensitive to poor water quality

Good nutrition during the first few weeks often determines how healthy the fish will become.

When Should Fry Start Eating?

Many species begin feeding shortly after absorbing their yolk sac.

This may occur anywhere from one to several days after hatching, depending on the species.

Watch for fry swimming freely around the aquarium, as this usually signals that they are ready to begin feeding.

Best First Foods

Excellent starter foods include:

Infusoria
Microworms
Vinegar eels
Commercial powdered fry foods
Liquid fry foods (for some species)

The food must be small enough for the fry to swallow.

Baby Brine Shrimp

Newly hatched baby brine shrimp are one of the best foods for many freshwater fry.

Benefits include:

Excellent nutrition
High protein
Natural feeding response
Rapid growth
Improved coloration

Many breeders consider baby brine shrimp the gold standard for raising healthy fry.

As Fry Grow

Gradually introduce:

Crushed flakes
Micro pellets
Finely crushed pellets
Small frozen foods
Larger live foods

Increase food size as the fry grow.

How Often Should You Feed Fry?

Most fry should receive:

3 to 6 small meals each day

Smaller, frequent feedings are much better than one large feeding.

How Much Should You Feed?

Offer only enough food that the fry consume within a few minutes.

Because fry are fed several times daily, overfeeding can quickly pollute the water.

Remove uneaten food whenever practical.

Water Quality Is Critical

Heavy feeding produces more waste.

Maintain excellent water quality by:

Performing small water changes
Using gentle filtration
Removing uneaten food
Testing water regularly

Healthy water is just as important as healthy food.

Feeding Livebearer Fry

Species include:

Guppies
Mollies
Platies
Swordtails

Suitable foods:

Powdered fry food
Baby brine shrimp
Microworms
Crushed flakes

Livebearer fry are generally larger than egg-layer fry and can often eat slightly larger foods.

Feeding Egg-Laying Fry

Species include:

Angelfish
Corydoras
Tetras
Rasboras

These fry often begin with:

Infusoria
Microworms
Vinegar eels
Baby brine shrimp

Food size is especially important during the first few days.

Feeding Discus Fry

Discus are unique because newly free-swimming fry initially feed on a nutritious mucus produced by their parents’ skin.

As the fry grow, gradually introduce newly hatched baby brine shrimp and other appropriate foods while allowing them to continue feeding naturally from the parents.

Signs Fry Are Growing Well

Healthy fry usually show:

Round, full bellies after feeding
Steady growth
Active swimming
Bright coloration
Good appetite

Common Feeding Mistakes

Avoid:

Feeding foods that are too large
Feeding too infrequently
Overfeeding
Ignoring water quality
Waiting too long to introduce larger foods
Keeping fry in overcrowded tanks

Rick’s Experience

During my years breeding angelfish, discus, guppies, mollies, rams, and many other freshwater species at FinTastik Tropical Fish, I found that two things consistently produced healthy fry: small, frequent feedings and excellent water quality.

One of my favorite foods for growing fry was newly hatched baby brine shrimp. The feeding response was immediate, growth was impressive, and young fish developed strong bodies and vibrant colors. Combined with regular water changes, this approach produced healthy juveniles that were ready to move into grow-out tanks.

Frequently Asked Questions

How often should I feed baby fish?

Most fry do best with 3–6 small feedings each day.

What is the best first food for fry?

It depends on the species, but infusoria, microworms, vinegar eels, and newly hatched baby brine shrimp are excellent choices.

Can baby fish eat regular flakes?

Not at first. Regular flakes are usually too large and should be crushed into a fine powder as the fry grow.

Is baby brine shrimp really that good?

Yes. Newly hatched baby brine shrimp are considered one of the best foods for raising many species of freshwater fry.

Why are my fry growing at different rates?

Growth differences are common. Genetics, feeding opportunities, and competition for food all play a role.

Rick Recommends

Keep these foods available:

Infusoria cultures
Microworm cultures
Vinegar eel cultures
Baby brine shrimp hatchery
Powdered fry food
High-quality crushed flakes

Having several food options available makes it easier to match the needs of different species.

Fish Food & Nutrition Guide
Live Fish Food Guide
Feeding Tropical Fish
Feeding Bettas
Feeding Corydoras
How Often Should You Feed Aquarium Fish?

Final Thoughts

Raising baby fish is one of the most rewarding parts of fishkeeping. The keys to success are feeding the right-sized foods, offering several small meals each day, and maintaining excellent water quality. With patience and consistency, you’ll give your fry the best possible start and greatly improve their chances of growing into healthy adult fish.