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Guppy Fish Science Experiment for Kids

Amaze your kids with this Fish Science Experiment where your kids will breed guppies while learning about genetics, fish life cycle, and so much more! This guppy science fair projects is perfect for kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, 6th grade, and Jr High students. We’ve included not only the procedure for the fun science project for kids, but a free printable observation book to help your students write down observations too. So make science for kids outrageously fun with this living, breathing science experiment for kids. Simply download pdf file with science notebook and you are ready to explore and learn!

Amaze your kids with this Fish Science Experiment where your kids will breed guppies while learning about genetics, fish life cycle, and so much more! This guppy science fair projects is perfect for kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, 6th grade, and Jr High students. We've included not only the procedure for the fun science project for kids, but a free printable observation book to help your students write down observations too. So make science for kids outrageously fun with this living, breathing science experiment for kids. Simply download pdf file with science notebook and you are ready to explore and learn!

Guppy Science Fair Projects

This science project is a little involved, but teaches kids so many things about animals, life cycle of a fish (see all our life cycles printables),  building an experiment, using the scientific method with kids, how genetics work in a simple way kids can understand, plus a big WOW factor. And other than time, all you need is an aquarium and a couple guppies from the pet store. This EPIC science project for kids is perfect for kindergarteners, grade 1, grade 2, grade 3, grade 4, grade 5, grade 6, grade 7, and grade 8 students too. This homeschool science experiment if fun for the whole family and will be a fun science activity you remember for a lifetime.

Why we decided to Breed Guppies

In typical Beth fashion, one day I just decided – hey let’s breed guppies! My hubby knows by now that once I get an idea in my head it’s best to just go with it. So we set up a 10 galloon tank (we had spare in the garage) in the kitchen (because we’d walk by more often). We went out and bought 3 female and 1 male guppy and we waited. I made a Guppy Observation Book & our Kindergarten Guppy Breeding Science Experiment began.

breeding guppies observations

Fish for Kids

We read information about guppies online. We fed, cleaned, and cared for the guppies. We named and charted on the guppies. And we waited. Learn more about fish for kids in this science lesson.

Guppy Science Fair Projects

Apparently guppies aren’t as hardy as they once were – the pet stores tell me it is from over breeding. Whatever it is we lost a couple females, bought a couple more, and bought a different male because ours seemed unable to perform his purpose.

  • Day 1+ We wrote in our note book about what we observed. We noted what they liked to eat, how they swam, how warm they liked the water, how much they poop (let me tell you it was a LOT), and came up with questions that we then looked up (such as how long do they live).
  • Day 31 days we had 2 babies. Not sure if the rest were eaten or what, but we had 2. (they kinda look like tadpoles)
  • Day 34 we only had 1 baby – the other one was eaten.
  • Day 42 we had 2 more babies. Again, not sure if the rest were eaten. We now had 3 babies

see the baby guppies

  • Day 47 – EUREKA! I noticed about 10 new babies in the tank. I quickly removed all the females (and put them in our 30 galloon community tank)except for the very large female who I put  in a small goldfish style bowl to make sure she didn’t eat the babies. I took out the large fern (which really hadn’t served its purpose anyway) we had put in for the babies to hide in as there were no mommies in the tank to hide from & we could see them better. I went back to check on the Mommy & noticed there were babies in the bowl with her. The kids & I watched her give birth – so cool! After she had 20 she seemed to stop. The bowl was getting crowded so I emptied it back in the 10 galloon nursery tank. I pulled the Mommy back out so she didn’t eat the babies. I went about making lunch & taking care of Tinkerbell & she had 20 more!! Again, I emptied the babies into the nursery & removed the mother. The Mommy guppy didn’t have any more & I placed her in the community tank. After careful counting I discovered we had the original 3 babies plus 55 new babies!! taking a closeup through the glass is hard
  • Day 85 – the 54 babies are growing a lot. They no longer look like miniature tadpoles. They look like miniature fish, about 3/4″ long. The fish are starting to show some color. The baby guppies eat a LOT – like all babies! They are finally eating normal food (no longer baby fry food) 4-5x a day. lots of babies
  • Day 114 – The guppy fish breeding babies are full grown! They are 1 1/4” long & have all the color they are going to get. I decided our observations should be done to get the fish to a better home.

sorting and counting 58 fish!Fish Science Experiments

Not that we don’t enjoy watching them…. but 58 fish in a 10 galloon aquarium isn’t really the best home. It means I have to change the water every 5 days or so! Since it is really hard to count fish when they are one big mob in the small tank, we separated them into bowls – 5 to be exact. This was also a great chance to practice counting by 10s! There were 10 fish in each of the 5 bowls with 8 fish remaining in the aquarium.

Graphing Guppies

Then we counted how many fish of each color there were & graphed them 3 ways:

  • Graphing Guppies in Color on Graph Paper
  • Graphing Guppies with cuisenaire rods
  • Visualizing Guppy Babies on a pie graph
Guppy Fish Color GraphedBaby Fish graphed with Cuisenaire Rods
baby guppy pie graph - conceptualizing a different wayCuisenaire Rods - conceptualizing numbers

Fun Science Experiments

I thought it was neat to see his little brain process the information. He couldn’t conceptualize what the numbers mean, but when we graphed the colors he looked at me with amazement and said – there are WAY more red than any other color! It was pretty cool to see him “get it”

It was a really fun experiment and we learned a lot! Students from preschoolers, kindergartners, grade 1, grade 2, grade 3, grade 4, grade 5, grade 6, grade 7, and grade 8 will love trying this science experiment. I’d really like to try egg layers next…..

Ocean Unit - huge, 250+ page Ocean Animals Lesson will allow you to learn about the ocean and aquatic animals. There are 7 units to allow you to more closely examine the wide variety of aquatic animals on our planet - from whales to sea urchin. Use this fun science unit as a semester long science curriculum complete with easy to understand information, fun worksheets, video links, science experiments, cute clipart, printable crafts, report templates, creative writing prompts, and tests. Of if you prefer, add these engaging science activities as a supplement to your zoology / biology lessons, summer schooling, following your child's interest, creating a fascinating science center, or planning for next years homeschool science lesson - you are going to love this fun, interesting, and thorough lesson! This aquatic animals for kids unit has tons of options making it perfect for the whole family  - from kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, 6th grade, grade 7, and grade 8 - there is truly something for everyone!

Are your kids loving learning about water animals? Learn more with our HUGE, hands-on ocean animals lesson plans with over 250 pages of information, experiments, worksheets, crafts, and ideas to make learning about fish FUN!

Ocean Color by Number Worksheet Free Octopus Color Matching

Ocean Activities for Kids

Looking for more ocean activities for kids? You will love these clever, free resources and ideas:

Homemade Bubble Solution for GIANT Bubbles - simple and amazing diy bubbles recipe for toddler, preschool, and children of all ages for fun summer activities for kids. A must add to your summer bucket list DIY Lava Lamp - super easy way to make your own lava lamp with simple things you have around your house. This homemade lava lamp is such a fun science project for kids of all ages to sneak in some summer learning. This science experiment is for toddlers, preschoolers, pre k, kindergarten, first grade, 2nd grade, 3rd grade, and kids of all ages at home, homeschool, summer camps, classroom, etc. Amazing Bubble Artwork for Kids - this is such a fun, simple, colorful and FUN summer activity for kids! This kids activities is not only fun to make but makes a beautiful art project too for your summer bucket list. Perfect for toddler, preschool, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade kids.

Fun Summer Activities

Looking for more outdoor activities for kids and things to do in the summer? Your toddler, preschool, pre k, kindergarten, and elementary age kids will love these fun ideas to keep them busy all summer long:

capillary-action-science-experiment-for-kids bleeding tissue paper fireworks craft Beautiful summer craft for kids using flowers

This watermelon rubber band activity is an epic science experiment for kids of all ages This amazing color changing slime is going to blow your mind! This heat sensitive slime will actually change color as your kids touch it because it is heat sensitive! This is a super cool project for kids you MUST TRY! Must try summer activity for kids to add to their summer bucket list EPIC Bubble Painting - kids of all ages will love this fun summer art project where they will make a bubble craft by blowing bubbles. Recipe included for this fun to make, easy, summer activity for kids!

About the author

Beth Gorden

Beth Gorden is the creative multi-tasking creator of 123 Homeschool 4 Me. As a busy homeschooling mother of six, she strives to create hands-on learning activities and worksheets that kids will love to make learning FUN! She has created over 1 million pages of printables to help teach kids ABCs, science, English grammar, history, math, and so much more! Beth is also the creator of 2 additional sites with even more educational activities and FREE printables - www.kindergartenworksheetsandgames.com and www.preschoolplayandlearn.com

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