Selachi

The Selachi are a species of large aquatic humanoids with a mixture of fish traits, primarily sharks. They live in Atlantis, which has an express tunnel link to Thistlewood. They are one of the groups that signed the Holowitz Treaty when it was written. They met The Interns when they kidnapped Gus Haynes, not realising he was the sheriff's son, and also stole Elijah DiSavona's necklace.

Appearance
All Selachi are very large, the smallest being 12 feet tall. They have sharp teeth and mottled scales, that flush with colour to display emotions. They come in a variety of colours and some have ridges or spines. They have nostrils that noticably dilate when they detect blood. They achieve adulthood at age 70.

Behaviour
Adolescent Selachi appear to be mischievous well into their 60s and are known to perform acts of vandalism and theft. They can be quite mocking and like to make threats; but prefer to specify that they would beat humans up rather than eat them. However, when encountered in episode 14, they did appear attracted to Joshuwa's blood. They respect violence and bravery, and appreciate smaller creatures that stand up to them.

Notable Selachi
Isolde - a large aggressive red-lined Selachi. Leader of the adolescents. Fliss tries to fight her until she is encouraged to back down by basically everyone present. Isolde is impressed by this headstrong stupidity and says that the humans can come hang with them whenever.

Krese - a blue-green sharklike Selachi. Called a nerd by the other adolescents. The more sensible and level-headed of the adolscents, Krese recognises the problems of having Gus as a prisoner and is the most willing to hand over both Gus and Elijah's necklace.

Tyros - a polka-dotted Selachi that's part of the adolescents. Accidentally casts doubt over how alive Gus is, because he wrongfully believed the Interns couldn't hear him because their human ears were too small.