The Green star polyp is a hardy colonial invertebrate commonly kept in aquariums. Its characteristic bright green star-shaped polyps seem to glow in the sunlight. These tiny filter feeders can absorb organics from the water column, and like other corals, the polyps of this species also house zooxanthellae, photosynthetic algae cells which provide the coral with nutrients. A purple mat of tissue, known as a stolon, connects the multiple polyps, often covering the rock beneath it.
What may look like glowing eyes are actually organs beneath each eye that are inhabited by symbiotic bioluminescent bacteria. There are eight species of Flashlightfish found in warm seas around the world. Like their relatives, the Orange roughy and the squirrelfish, they are nocturnal animals that retreat to caves beneath reefs in the daytime, and hunt for small animals in shallower water at night.
This type of jellyfish is often cultured around the world. Their sting is not powerful because they are planktivores. The flower-like pattern in the center of the disk is composed of the reproductive organs; reproduction is both sexually and asexually. This delicate invertebrate is known to survive for only a few months in the wild, but can live for years in an aquarium environment.