Mr. Grouper was swimming toward the school. Molly caught him just in time.

"Molly? What are you doing?" Mr. Grouper asked. Molly was crying.

"Mr. (sniff, sniff) Mr. Grumpfish..." Molly sniffled.

"Mr. Grumpfish what?" Mr. Grouper asked. Molly explained everything.

Meanwhile, the rest of the guppies were crying. Deema and Nonny were holding onto each other. Goby and Gil were holding onto Oona. Suddenly, Mr. Grouper burst through the door. He was very upset about what Molly said about what Mr. Grumpfish was doing.

"MR. GRUMPFISH!" Mr. Grouper hollered. The two large fish left the classroom. While they were gone, the guppies started to wipe their tears. They didn't speak. A short time later, Mr. Grouper came back but Mr. Grumpfish didn't. The guppies looked at their teacher.

"I'm very, very, very sorry I left him to be your substitute. I thought it would help him change his attitude. But I guess I was wrong. Now I allowed you to be put in harm's way. Please forgive me," Mr. Grouper said in a soft tone. The guppies decide to forgive Mr. Grouper and gave him a big hug.