Hairworms

**Gordiacea** is a group of marine invertebrate animals that are characterized by the presence of special hair-like formations on their bodies. These hairs are a product of adaptation of these animals to life on sand and pebbles, and are used by them to filter water and capture small particles of food.

Hairworms play an important role in the ocean ecosystem, as they participate in the cycle of matter and energy in nature. They attract a huge number of microscopic marine animals, such as protozoa, crustaceans, worms and others. In addition, they serve as food for many species of fish and other aquatic animals.

There are many species of hair lilies, some of the most famous are sand lillies, sea lillies, and sand lilies. Most hairworms live in warm seas and oceans where there is a lot of sand and gravel. They have a unique way of breathing: these animals inhale air through their hairs and exhale water. Because of this, their body becomes denser and they can swim more easily in the water.

Some species of hairworms are of scientific interest due to their ability to reproduce rapidly and their ability to survive in harsh environmental conditions. Some of them are used as scientific samples to study the mechanisms of evolution and adaptive abilities in animals.