Our Animal of the Week is the spinecheek anemonefish! These fish form a symbiotic relationship with their host anemone, so they are unaffected by the stinging tentacles. | National Aquarium

🐠 Clownfish live in small groups around a sea anemone. When they hatch, all of them are male and no female exists at first. As the group grows, one fish becomes larger and more aggressive than the others. Size and behavior naturally decide dominance, the biggest fish controls the group and gets priority access to food and space. This dominant male gradually undergoes a biological change. His male reproductive organs shrink, female organs develop, and he permanently becomes the female of the gro