Fin is seen in Talons of Power when Turtle is going to warn his mother about Anemone. Fin sees Turtle and wonders why he has left Jade Mountain Academy and came back to the Deep Palace. He seems to have a salty sense of humor, referring to the academy as a ''fancy hugging school''. Turtle then tells him to gather their brothers and take them all away from the palace, which Fin takes seriously. He may be a cartographer, as he mentioned wanting to go on a "mapping expedition" to the outer islands of the Bay of a Thousand Scales. He then jokes that taking all his brothers away from the palace will look more like an invasion than a mapping expedition.
- A fin is a flattened appendage on various parts of the body of many aquatic vertebrates and some invertebrates, including fish and cetaceans, used for propelling, navigating, and balancing.
|Commander Shark||Queen Coral||King Gill|
|Princess Moray||Prince Fin||Prince Cerulean||Prince Turtle||Prince Octopus||28 Unnamed Sons|
|Princess Tsunami||Princess Anemone||Princess Auklet|
|Queens|| Present: Queen Coral|
|Anemone • Auklet • Cerulean • Fin • Gill • Moray • Octopus • Orca • Shark • Tsunami • Turtle|
|Albatross • Clearpool • Cowrie • Current • Eel • Fathom • Humpback • Manta • Reef • Ripple • Sapphire • Scallop • Splash|
|Jade Mountain||Tsunami • Turtle • Anemone • Pike • Barracuda • Snail|
|Other Dragons|| Present: Abalone • Flounder • Herring • Herring's Brother • Kelp • Lagoon • Nautilus • Pearl • Piranha • Riptide • Snapper • Squid • Tempest • Tortoise • Urchin • Webs • Whirlpool|
|Kingdom||Bay of a Thousand Scales • Deep Palace of the Sea • Island Palace • Summer Palace • The SeaWing Royal Hatchery|
|Society||Aquatic • SeaWing Council • SeaWing Royal Family • Talons of Power Ceremony • The Royal SeaWing Massacre|