Hemocytes are a type of circulating cell found in many invertebrates, including arthropods (e.g. insects and crustaceans) and mollusks (e.g. snails and oysters). These specialized cells are responsible for a range of vital functions, such as fighting infection, repairing damage, and producing antibodies. Hemocytes also serve an important role in hemostasis, helping to form a barrier to prevent the spread of infections, allowing wounds to heal. Additionally, they are used in research to study the development and regulation of the immune system in invertebrates.