Disclaimer: We're ten chapters in, you should know this by now.

"Which one is your favourite?"
"PAW Patrol!"
 - Me showing my three-year-old cousin Octonauts on my phone

Also shout to my brother who is also named Finn :)

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It was a peaceful afternoon under the sea. The Octopod was stationed in the Western North Atlantic Ocean. Down in the launch bay, Tweak was inside the GUP-E, showing Elekai how to change the GUP's batteries.

"The battery is in here," said Tweak, removing the battery from the GUP. "You bring it over to the battery charger, and replace it with a new one."

Elekai nodded and went to pick up a freshly charged battery. He dragged it out of the charger and over to the dock where the GUP was stationed. "These things are heavy," he said. He lifted it into the GUP, where Tweak pushed it into the battery slot.

"That should do it," said Tweak. "I'm glad we got to this now. Last time I procrastinated on changing the GUP-E's battery, I got Peso trapped in a crevasse."

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Up in HQ, a loud whale call was heard. "Do you hear that?" Lekona asked. Everyone looked out of the window. Outside, two whales, one humpback and one fin, were approaching the Octopod.

"Ahoy, Octonauts!" The humpback called.

"Oi, it's our old friend Mitch!" Kwazii went to the window.

"This is my new buddy, Finn," said Mitch.

"Hullo," said Finn.

"We're going to the feeding grounds," said Mitch. "I saw your ship and figured I'd drop in."

"I hear the krill is great this time of year," said Finn. "Perfect for us filter-feeders."

"Nice to see you again," said Captain Barnacles. Mitch and Finn swam off.

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About half an hour later, the Octonauts heard a call for help, and saw Finn swimming back towards the Octopod.

"Is something the matter?" Captain Barnacles asked.

"Our pal Blanche got hurt on the feeding ground," said Finn. "Mitch told me to come find you, since I'm the fast one."

"We're gonna help you," said Captain Barnacles. "Kwazii, sound the Octo-Alert." Kwazii pressed the Octo-Alert button.

"Octonauts, to the launch bay!"

The Octo-Alert blared throughout the Octopod, and the Octonauts all rushed to the launch bay.

"Octonauts, our new whale friend Finn has found an injured dolphin out on their feeding grounds. Peso, you take the GUP-E. Kwazii, Elekai; you and me. GUP-A. Now."

"Sir yes sir!" Captain Barnacles, Kwazii, and Elekai entered the GUP-A, while Peso prepped the GUP-E. They exited the Octopod, where Finn was waiting for them.

"The feeding ground is this way," said Finn, showing them the way. The Octonauts went to the feeding ground, where Mitch, a few other whales, and Blanche, an Atlantic white-sided dolphin, were waiting for them.

Peso exited the GUP-E and approached the dolphin. "Don't worry, Miss Blanche. My name's Peso. What's wrong?"

Blanche showed him her tail, which had a pretty nasty bruise; so much that Kwazii and even Elekai winced upon seeing it. "Can you fix it?"

"Of course," said Peso. He took out his handy dandy bandages and wrapped up her tail. "How did you get hurt?"

"She got distracted and ran into a rock," said Mitch.

"I saw something sparkle," said Blanche. She pointed in the direction of the object. Elekai exited the GUP-A, and he and Peso went to investigate. After digging in the sand for a bit, they found the shiny object; a pale-yellow pearl necklace.

"It's beautiful," said Peso. "I wonder where it came from."

"It could use a polish," said Elekai.

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Back at the Octopod, Elekai had fixed up the necklace and turned it into two bracelets. He swam outside to present them to Finn and Blanche.

"You're all sent from the heavens," cooed Blanche.

"It's nice to have my fin looking fabulous," said Finn.

The Octonauts all laughed. All was well again under the sea.

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"Calling all Octonauts!"

"Kwazii!"
"Peso!"
"Shellington!"
"Dashi!"
"Inkling!"
"Tweak!"
"Juniors!"

…

"Tunip!"

Captain Barnacles chuckled and put Tunip down. "Kwazii, activate Creature Report!"

"Creature Report, Creature Report!"

"Creature Report!" (clap clap clap)

"Facts: Fin whales filter-feed."

"Check!"
"Check!"
"Check!"

"They're known for their incredible speed."

"Check!"
"Check!"
"Bree!"

"They're seventy-five feet from head to tail…" (Creature Report, Creature Report)

"…and feed alongside dolphins and whales." (Creature Report, Creature Report)

"And as for their claim to fame…"

"Check!"
"Check!"
"Chirp!"

"The distinctive fin on their back is where they get their name!"

"Dance break!"

(insert dance break here)

"Go whale! Go whale! Go whale! Creature Report, Creature Report!"

"Creature Report!"

"We're done with our mission! Octonauts, at ease, until the next adventure!"

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Information about the fin whale taken from NOAA Fisheries