Strongylocentrotus purpuratus (purple sea urchins) (tidal pool at Yaquina Head, Oregon, USA) 2 : 無料・フリー素材/写真
Strongylocentrotus purpuratus (purple sea urchins) (tidal pool at Yaquina Head, Oregon, USA) 2 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Strongylocentrotus purpuratus (Stimpson, 1857) - purple sea urchins in a tidal pool in Oregon, USA.This Oregon tidal pool has dark purplish organisms bearing spines - these are sea urchins, also known as regular echinoids. They are starfish relatives with a pentaradially-symmetrical, subglobose, calcareous skeleton (test) covered in spines. The mouth is underneath the urchin, close to & at the water-substrate interface. Sea urchins are algae grazers - they use a pentaradially-structured jaw called an "Aristotle's lantern" to scrape algae and biofilms from hard substrates.The dark-colored rocks in the tidal pools of this area have eroded from the Ginkgo Basalt, one of many lava flows in the Miocene-aged Columbia River Flood Basalt.Classification: Animalia, Echinodermata, Echinoidea, Echinoida, StrongylocentrotidaeLocality: tidal pool on the southern side of Yaquina Head, coastal Oregon, USA-----------------------------------Info. at:en.wikipedia.org/wiki/Strongylocentrotus_purpuratusanden.wikipedia.org/wiki/Sea_urchin |
| 撮影日 | 2012-08-03 13:49:31 |
| 撮影者 | James St. John |
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