JJ the Fish

By: Joe Roberts

Day 1, April 7

• This is the day that I first met my Medaka egg. I decided to name him JJ. It had only been .2 hours since he was born. He was very new and didn’t have many features.

Stage 2(.2 hrs)

Day 2, April 8

• It is the second day of JJ’s life. I can’t believe what I see! His little heart is beating for the first time. I can actually see what was going on in his egg.

Stage 17 (23 hrs)Yolk sac

Oil globules

heart

Day 2, April 8 (heartbeat)

Day 3, April 11

• JJ is developing even more. His blood is now visible. It is an red-orange color. JJ is starting to have more features for me to observe.

Stage 25

Optic cup/eye

Blood

Day 4, April 12

• It is my fourth day with JJ. I start to notice that he is more slowly developing than the other fishes. More things are visible this day, but less than the other groups.

Stage 29

cytoplasm

Day 5, April 13

• It is the fifth day with JJ. I can actually start to see a fish in the egg. I can tell he is starting to develop more, and is getting closer and closer to hatching.

Stage 31

chorion

Pectoral fin

Mouth/jaws

Day 6, April 14

• It is my sixth day with JJ. His heart is starting to beat faster and he is moving sometimes. I really hope that he hatches soon, but we will see tomorrow.

Stage 34

Day 7, April 15

• It is our seventh day with JJ. While other groups eggs have hatched, ours is still in its egg. I notice that it hasn’t changed much since the day before.

JJ’s Death

• We look under the microscope for a long time. After a little we notice that he is not moving and his heart is no longer beating. Our JJ is now dead.

Adoption of Sushi

• After the death of JJ, our group needs a new fish to observe. So, we picked out one of the extra fish. We decided to name him Sushi. He seems like he is much more developed than JJ was.

brainsomites

Sushi Hatches

• It has been a very eventful day. First, JJ dies, then we adopt Sushi and he hatches. I am sad that my time with Medaka fish is over. I will not be seeing Sushi again. It is a little sad to know this.

THE END!