Sea grass

Japanese: 海草 - かいそう(英語表記)sea grass
Sea grass

It is a large marine plant, but usually refers to a marine seed plant. Opposite of seaweeds. All seaweeds are monocotyledonous plants, with about 50 species in 12 genera and 2 families distributed around the world. There are 15 species in 8 genera and 2 families along the coast of Japan, including Zostera marina and Zostera serrata, which form underwater forests called seaweed beds and are ideal habitats for fish and shellfish. In terms of horizontal distribution, Zostera serrata is found north of the Kanto region, but most seaweeds are found west of the Chubu region. Temperate seaweeds native to Japan include Zostera marina above the low tide line, Ebiamamo at the low tide line, Zostera marina just below the low tide line, and Oomazumo, Sedgeamamo, and Hollow Zostera marina growing a few to 10 meters below the low tide line. Tropical species include sea weed, sea hyacinth, and pine-leaf sea weed, above the low tide line, Ryukyu seagrass at the low tide line, bow-grass, red seagrass, and Ryukyu seagrass just below the low tide line, and sea iris grows a few to tens of metres below the low tide line.

[Otaki Sueo]

Eelgrass
It grows in colonies on the sandy, muddy shallow seabed. It is also known as Ajimo (taste seaweed), Moshiogusa (seaweed salt grass), and Ryugu no Otohime no Motoyuinokirihazushi (a cut-off knot of Princess Otohime of the Dragon Palace). © Underwater Fort Enterprise, Isamu Soyama ">

Eelgrass

Sugamo
It takes root firmly in the reefs of the coast. The length of the leaves is 1 to 1.5 m. © Underwater Fort Enterprise, Isamu Soyama ">

Sugamo

Seaweed
It grows on the sandy bottom of shallow seas. It is also called Umikoban because the leaf shape resembles an oval coin. © Underwater Fort Enterprise, Isao Soyama ">

Seaweed


Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

海生の大形植物のことであるが、普通は海生の種子植物をいう。海藻seaweedsの対比語。海草類はすべて単子葉植物で、世界に2科12属約50種分布する。日本の沿岸にはアマモ、コアマモほか2科8属15種あり、藻場(もば)とよばれる海中林を形成し、魚貝類の絶好なすみかとなっている。水平分布では、スガモが関東地方以北にみられるが、多くの海草は中部地方以西に分布する。日本産の海草で温帯性のものは、干潮線上にコアマモ、干潮線にエビアマモ、干潮線直下にアマモ、干潮線下数メートルから十数メートルにオオアマモ、スゲアマモ、タチアマモが生育する。熱帯性のものは、干潮線上にウミジグサ、ウミヒルモ、マツバウミジグサ、干潮線にリュウキュウスガモ、干潮線直下にボウアマモ、ベニアマモ、リュウキュウアマモ、干潮線下数メートルから十数メートルにウミショウブが生育する。

[大滝末男]

アマモ
砂泥質の浅海底に群落をつくる。別名アジモ(味藻)、モシオグサ(藻塩草)、リュウグウノオトヒメノモトユイノキリハズシ(竜宮の乙姫の元結の切りはずし)©水中フォート・エンタープライズ 楚山いさむ">

アマモ

スガモ
海岸の岩礁にしっかりと根を張る。葉の長さは1~1.5m©水中フォート・エンタープライズ 楚山いさむ">

スガモ

ウミヒルモ
浅い海底の砂地に生える。葉形を小判に見立ててウミコバンともいう©水中フォート・エンタープライズ 楚山いさむ">

ウミヒルモ


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