👉 Tetraonchoididae is a family of freshwater tetrahymies that includes species primarily found in the eastern Atlantic Ocean and parts of the Mediterranean Sea, including the Arabian Sea. This family is characterized by their small size, which varies from a few millimeters to several centimeters, making them easy to identify with their slender bodies and large, rounded eyes. Tetraonchoididae is also known for their unique adaptations that allow them to survive in water conditions where oxygen
