The Outer Edge of Fringing Reef on Nishihama

            礁縁部を散策中

- - - Physical features of this sea - - -
The reef around Haterumajima is fringing reef [*1].
The sea of Nishihama [*2] is the nature of inner bay, therefore outside the fringing reef is like lagoon with patch reef [*3] and get deeper gradually.

- - - Location & Time taken on - - -
outside the fringing reef
reef front [*4]
reef crest [*4] ⇦ here 14:58:36
reef flat [*4]
reef pool
shoreline

------------------------------
[*1] Fringing reef is one of the three main types of coral reef and grow near the coastline around islands and continents. They are often separated from the shore by narrow, reef pool.
[*2] Located on Northwest Coast of Haterumajima
[*3] Patch reefs are small, isolated reefs that grow up from the open bottom of the island platform. They vary greatly in size, and they rarely reach the surface of the water.
[*4] components that make up a fringing reef
- - -
Reef Flat：A zone that is located closest to the shoreline and is flat, shallow, broadest
This zone suffers the damage from sediments by land, therefore the diversity of life is lower in comparison with other zone. The coral density is low, and leathery corals are often found there.
- - -
Reef Crest：A zone that is located between Reef Flat and Reef Front and in the most highest part
This zone has the best balance between sunlight and waves, therefore vibrant corals are found there and density is high too.
- - -
Reef Front：A zone that is located closest to the open ocean and is found at the outer edge
This zone is often quite steep and descends either to a relatively shallow sand bottom or to depths too great to allow the growth of coral. Wave action disperses pollutants and carries nutrients to this zone, therefore this is where the greatest diversity of corals exist.


**********
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Hateruma, Okinawa, Japan
IMG_0142_2048
   

Taken on: September 5, 2013

Tags:

skindiving

snorkeling

underwater

transparent

turquoise

blue

water

surface

reflection

sea

ripple

wave

white

sandy

seabed

tropical

fish

Thalassoma hardwicke

セナスジベラ

Pomacentrus moluccensis

ネッタイスズメダイ

Neoglyphidodon melas

クロスズメダイ

Scleractinia

Acroporidae

Acropora

Hermatypic

stony

table

branching

Alcyonacea

Alcyoniina

Alcyoniidae

Lobophytum

crassum

leathery

coral

fringing

reef

crest

edge

northwest

coast

Nishihama

ニシハマ

ニシ浜

Hateruma

波照間

Haterumajima

波照間島

Yaeyama

八重山

Okinawa

沖縄

Ryukyu

Ryūkyū

琉球

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okinawa70287164@N08

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Sets appears in: • 2013 Hateruma, Okinawa

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