What is hidras?

Hidras are freshwater animals that belong to the genus Hydra. They are a type of cnidarian, meaning they have stinging cells, or nematocysts, on their tentacles. They are commonly found in ponds and slow-moving streams throughout the world.

Hidras reproduce both sexually and asexually. A single hydra can produce buds, which can develop into new individuals, as well as sexually produced eggs and sperm. They are also capable of regenerating lost body parts, including whole individuals from small fragments.

Hidras are carnivorous and feed on small aquatic invertebrates, such as water fleas, worms, and small crustaceans. When a small prey animal comes in contact with the hydra's tentacles, the nematocysts are triggered and inject toxins into the prey to immobilize it.

While hidras are not harmful to humans, their toxins can be deadly to their prey. They have been the subject of numerous studies on regeneration and stem cell research due to their unique ability to regenerate.