noun a small, tentacle-like structure found in certain cnidarians such as hydras
Actinula plays a role in the ecology of marine environments as part of the reproductive cycle of cnidarians.
Actinula is a term used to describe a larval stage in the life cycle of certain marine organisms, such as jellyfish.
Actinula is a larval form of certain cnidarians, such as Hydra, that is free-swimming and settles to form a new individual.
In zoology, actinula refers to a larval form of certain animals that undergo metamorphosis to develop into the adult form.
In the field of marine biology, a writer may use the term 'actinula' when discussing the larval form of certain hydrozoans.
A marine biologist may study the development and behavior of actinula larvae in various species of hydrozoans.
A research scientist may investigate the role of actinula in the life cycle of different marine organisms.