2. Clownfishes also don't need an anemone to host them. They will do fine without a host, or with a substitute host, such as a leather coral--for example, a toadstool (Sarcophyton sp.). Anemones need very specific, stable water conditions and can be very challenging to care for, especially for a new marine aquarist. Leather corals are good beginner corals, hardy and growing quickly. Some people also have clownfish that are hosted by zoanthids and mushrooms (just make sure to stay away from the so-called elephant-ear mushroom, which will trap and eat your fish).