Turtlefish

Huge armored fish dwelling in the marshlands of Greymantle. Their name comes from their plated, armored bodies, and their flattened, turtle-like shape.   Like flounders, these armored giants swim on their sides in the shallow water, so they are mobile in areas that other large fish are not. They are also capable to surviving for hours outside of the water. So, it is not uncommon to see their armored sides floating along outside of the water, or them scooting along overland to travel between bodies of water, easily mistaken for turtles at a distance.   Their jaws are very formidable, with serrated, spiky, scissorlike teeth. While they may not be very dexterous creatures, they are keen ambush hunters, as well as actively hunting less-mobile prey underwater, such as crustaceans and mollusks. As an ambush hunter, they snap up whatever they can catch, including fish, baby crocodiles, frogs, and birds. The largest examples of the species have been seen catching unlucky terrestrial animals.   Though they are difficult to hunt and can be dangerous if not enough caution is used, their scales, hides, and bones are highly prized for the manufacture of tools and armor.   arapaima-like scales both leather (scaled and de-scaled) and individual scales used scale armor, scale shield scale uses: tools (scraper, file, pin), jewelry, armor "turtle shell" bones useful   https://www.leather-dictionary.com/index.php/Fish_leather