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''Rhodactis howesii'' is a species of marine cnidarian in the order Corallimorpharia, a sea anemone-like corallimorph found on reefs in tropical regions of the Pacific Ocean. It is commonly known as the green fuzzy or elephant ear mushroom coral and also as the giant anemone, the giant mushroom anemone, the giant cup mushroom or the giant anemone.〔(Animal-World: Green Fuzzy Mushroom )〕 This species is toxic when eaten raw and ingestion can cause fatal poisoning.〔(Observations on the Toxic Sea Anemone, ''Rhodactis howesii'' (Coelenterata) )〕 ==Description== This coral mushroom is essentially a coral without a skeleton and its internal structure is similar to a stony coral. The upper surface is the oral disc. It has a short stalk or column below which is the pedal disc which adheres to the substrate. It can detach itself and drift to another location. It is either green or brown, and five to eight centimetres high. The tentacles are very short and somewhat knobbly, giving the oral disc a fuzzy appearance. They tentacles at the edge of the disc are longer and contain toxins which damage other corals close by but which are harmless to humans.〔 ''R. howesii'' is a carnivore and catches plankton and other micro particles that float past its oral disc. It also obtains nutriments from its endosymbiotic algae.〔 ==Reproduction== There are three asexual means of reproduction. Budding can occur when new individuals are formed from pieces that divide off from the pedal disc. Fragmentation can occur when the individual moves slowly over the substrate and leaves small pieces of itself behind which eventually grow into new individuals. Division or fission can also occur when the corallimorph divides down the centre to form two new individuals.〔 Sexual reproduction also sometimes occurs and eggs and sperm are released into the water. They unite and form free-swimming larvae which are initially planktonic. Later they settle and adhere to the substrate, growing into new individuals.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rhodactis howesii」の詳細全文を読む スポンサード リンク
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