Peridinium pentagonium (English spelling)

Japanese: Peridinium pentagonium（英語表記）Peridiniumpentagonium

… Ceratium hirundinella grows in large numbers in fresh water, giving the water an unpleasant odor and taste. In the ocean, Noctiluca ecintillans , Ceratium furca , Ceratium fusus , Peridinium pentagonium , and Exuviaella marina are common. When Gymnodinium and Gonyaulax species cause red tides, they cause great damage. …

From [Peridinium]

…Uzuobimushi [Mitsuo Chihara] [Minoru Imajima]. …

*Some of the terminology explanations that mention "Peridinium pentagonium" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…マミズツノオビムシCeratium hirundinellaは淡水に大発生して水に臭気や味を生じさせる。海ではヤコウチュウNoctiluca ecintillans，ナガツノオビムシCeratium furca，ユミツノオビムシCeratium fusus，ゴカクウズオビムシPeridinium pentagonium，ススフタヒゲムシExuviaella marinaなどが普通にみられる。ギムノジニウム属Gymnodiniumやゴニオラクス属Gonyaulaxなどの種類が赤潮になったときは大きな被害がでる。…