Dreaming in the Ocean

 is one of the original non-canon short stories from Natsumi Mukai's +Anima manga.

Synopsis
Cooro and friends arrive in the port city Araku and are in awe at how much there is in the city. Cooro tries to eat some food at the market, but Husky and Nana Alba stop him because they don't have any money. They decide to find some work there, and Senri notices a poster recruiting monster hunters. The children inquire and are refused the job because of their age but are allowed to work in the galley instead. The recruiters need one more person, and a man wearing a large backpack, Greena Eito, comes running to the port. They hire him, but soon start to regret it after he reveals that he is not a soldier but a researcher.

At the fishing platform, the fishermen fish while the children cook and the monster hunters sit around and wait. Soon the monster shows up and the monster hunters are caught offguard by how large it is. Greena Eito uses a flamethrower to keep the monster at bay but it then attacks the other side of the platform. Cooro takes the flamethrower from Greena, flies over to the monster, and uses it to repel the monster. Greena is in awe; this being the first time he has seen a +Anima.

Husky negotiates with the boss to use his fish Anima to keep a look out in exchange for more money. Greena uses another device to watch Husky swimming underwater. Cooro questions Greena about his flamethrower and learns that he had never actually used it before. Greena then guesses that the four children are all +Anima, and questions why they are travelling together.

Greena puts on a diving suit and heads down to the monster's lair, wanting a souvenir. Husky stops him, but their struggling aggravates the monster. It resurfaces so Cooro and Senri work together to tie it up. Upon investigation they find out that the monster is actually a giant octopus. It sprays its ink and flees, hoever Senri managed to remove a tentacle with intent on eating it.