Hydroids are a life stage for most animals of the class Hydrozoa, small predators related to jellyfish. Some hydroids such as the freshwater Hydra are

---

Hydroids are a life stage for most animals of the class Hydrozoa, small predators related to jellyfish. Some hydroids such as the freshwater Hydra are solitary, with the polyp attached directly to the substrate. When these produce buds, they become detached and grow on as new individuals.

---

Size: 4754px × 3155px
Location: Sweden
Photo credit: © Martin Almqvist / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: algae, animals, bacteria, calcium, chloride, coastal, depths, ecosystems, fish, fundamental, fungi, habitats, hydroid, hydrozoa, jellyfish, level, life, living, magnesium, marine, medus, nature, ocean, oceans, organism, organisms, phytoplankton, plankton, plant, plants, polyp, potassium, protists, salinity, sea, shorelines, sodium, space, submarine, underwater, variety, vertebrates, virus, water