The editor has compiled the answers to the latest questions in the Magical Marine Science Learning Center. You can read them directly below. I hope it will help you better understand and learn marine science knowledge and receive generous rewards.
Pancake sea urchin
sea cucumber
Answer: Pancake sea urchin
The official name of the sand dollar is sea urchin. It is a kind of aquatic wild animal in the sea and belongs to the class Echinacea. It is different from the spherical sea urchin. The upper and lower sides of its carapace are obvious, with five petal-shaped areas arranged on it, which is very similar to the shape of a coin.