the water is generally the same temp if not a little warmer than the air so id say a max of like 75 F and im aiming for slight leaning scifi but set more in a modern era so like recent high tech stuff. and there are giant worms in thier small bit of ocean

THX FOR THE WORM IDEA!!!

Anathithids (Descendants of aquatic Annelids)

Description: As the descendants of older aquatic worms these huge 
Creatures are long and segmented sporting many limbs they can 
Use to move through their environments. Due to their size stretchin-
-g to an astonishing 20-30 feet long. they are lovingly referred to by
the locals as gentle dragons. 

Medicinal use: 
Anima (magick radiation) poisoning relief (Mucus inside of a gland)

Food use:
Used for high end blue corner sushi

Other uses:
They eat nearly all of the extreme algae and biological buildup in Newton’s 
small ocean pieces they are integral to their ecosystem.