Atlantisians are the inhabitants of the underwater city Atlantis, they are blue skined humanoids with gills on their neck, black eyes and no hair. They make an appearance in 25ft under the seat when the group visit Atlantis to retrieve the keys to the fridge
The Chief of PoliceThe Chief of Police presented the picture of Edd, Matt and Tom stealing the keys to the King, whos accent he finds hard to understand. He has two sharpened bottom teeth. The chief controls all of the police in Atlantis and has a extreme hatred towards the idiotic cop, Frank.
The ExecutionerThe executioner is the atlantisian who sentances the group to death by Oxygen for stealing the keys from the museum and releasing the sea monster upon Atlantis. He dresses in a black hoodie with a black mask
FrankFrank is an idiotic cop who was part of the squad that was searching for Edd, Matt and Tom when they stole the exibit from the museum. He is fooled by the groups disguises and then mistakes a big rock for Edd, Matt and Tom, so he arrests it.
SimonSimon is a tour guide who works in the museum of wonders from above in Atlantis. He guides the tour which Edd, Matt and Tom tag along with and shows the group the new exibit which they believe is used to clear ones ears or other orofices, althougth it is actually Matt's keys.
The King of Atlantis is an Atlantisian with a bushy grey eyebrows and mustache who speaks in mumbles, the chief of police finds him hard to understand.
- According to the Atlantisian museum of the wonders of above, life on the surface is like a person in a desert gasping for water before dying. This causes Matt to reply "Thats only half true!"
- The worst possibly death for an atlantisian is death by oxygen, where there are tied to a balloon and float to the surface
- At sometime, the atlantisians captured a giant octopus and kept it behind a wall of extremly fragile glass. Tom then accidentally released it upon Atlantis once agin when he leaned on it. It is unknown if they have managed to contain the creature or if it is still at large