Hydra

Definition: Hydra are small, freshwater organisms that resemble miniature sea anemones. They can be pests in aquariums as they prey on small invertebrates and fish fry.

Function in the Aquarium: Hydra are tiny, predatory organisms that can harm small and vulnerable aquarium inhabitants. They use tentacles equipped with stinging cells to capture and immobilize their prey. Controlling hydra in aquariums is important, especially in breeding setups, to prevent them from harming baby fish and invertebrates.