Pacific sea nettle
|Information sur la photo|
|Copyright: Michael Porterfield (mporterf)
|Date de prise de vue: 2007-06-14|
|Appareil photographique: Nikon Coolpix 5700|
|Exposition: f/2.9, 1/5 secondes|
|More Photo Info: [view]|
|Versions: version originale|
|Date de soumission: 2009-06-12 6:24|
|[Ligne directrice - Note] Note du photographe|
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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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