The long armed squid only appeared in one episode. Kwazii was telling ghost stories about a sea ghost and Peso got frightened but the story was interrupted when the vampire squid informed Captain Barnacles about a large whining so Captain Barnacles sent Peso and Kwazii out to investigate. They ended up going to an old shipwreck so Peso got scared because there was a shipwreck in the story but he got brave and went in. He helped an injured anglerfish, but was frightened when he saw a white tentacle, like from Kwazii's story. Kwazii went to look for him, but was startled by a bunch of white tentacles and swam to the bottom of the shipwreck where he found Peso. Captain Barnacles had come down after losing contact with them, and they heard the spooky whining. As they were about to leave, a tentacles grabbed Kwazii, then Peso, and when they turned around when an elbow bumped them. They are almost out, but then they found a large white large squid. They were frightened, but when it asked for help, the creature claimed to be a long armed squid. Then the squid explained that he was moaning to get someone's attention because one of his arms was tied around a pole in the ship. Peso came to the rescue and quickly untied an injured arm and bandaged it up. The long armed squid thanked them and they left. However, Peso forgot his medical bag, though the long armed squid found it and returned it to him, but was startled by the vampire squid shouting "Ah! Vampire!".
Octonauts and the Long Armed Squid S02E11