👉 Ostraca is a type of animal that is found in the digestive system of some species of fish. They are tiny, round animals with no actual teeth or jaws but instead have a strong suction force from their mouths to suck up food through their gills. Ostracoids are also known as "stomach" or "stomach-like structures," which are hollow chambers that sit on top of the gills and help facilitate the movement and swallowing of fish.
