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Pacific sea nettle


Pacific sea nettle
写真に関する情報
著作権: Michael Porterfield (mporterf) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 60 W: 74 N: 84] (673)
ジャンル: Animals
メディア: カラー
撮影した年: 2007-06-14
カテゴリー: Cnidarians
カメラ: Nikon Coolpix 5700
Exposure: f/2.9, 1/5 seconds
More Photo Info: [view]
Photo Version: Original Version
アップロードした日: 2009-06-12 6:24
ページビュー: 9073
ポイント: 2
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Chrysaora fuscescens (generally referred to as the Pacific sea nettle or the West Coast sea nettle) is a sea nettle, a common variety of true jellyfish (scyphozoan), found in the Pacific Ocean mostly near the coast from California to Alaska (perhaps also to Japan), although the species was originally described from individuals collected far offshore in the open North Pacific. Some may suspect that the population is increasing because of human influences to coastal regions, but little to no historical population data from which to compare current abundances exist. This presumptive increase is thought to have a negative impact on populations of larval fishes.

Diameter of the body (the "bell") can be greater than 1 m (3 feet), although most are less than 50 cm across. The long, complicated, spiraling oral arms and the 24 tentacles may trail as far as 3.6 to 4.6 m (12 to 15 feet) behind the bell. [wikipedia]


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