Ocellaris clownfish

Clownfish belong to the group of anemone fish: All anemonefish are born male. The dominant, largest animal in an anemone is always the only female. If the female dies, the strongest male changes into a female within a week. In the wild, female clownfish usually lay their eggs during the full moon; the larvae hatch after only 6 days.

They even live among poisonous anemones, but are not harmed by them, as they let the anemone tentacles slide over their body until they are immune to the poison. The clownfish lives together with its anemone in a symbiosis: even if it lives in the ocean, it is not a good swimmer and therefore never strays far from its anemone, it is dependent on protection. 

At the same time he can also protect the anemone by scaring its predators by swimming out when they feed.

But not all anemones enter into a symbiosis with anemone fish. Those in which anemonefish live, however, have a very special "personal care service" - the anemonefish removes debris, debris and parasites from the anemone.
Although anemones are more animal than plant, some actually do photosynthesis - they use sunlight to produce energy.

Look out for the clownfish in the tropical coral reefs of our aquariums.