Sea urchins are typically spiny, globular animals, echinoderms in the class Echinoidea. About 950 species live on the seabed, inhabiting all oceans and depth zones from the intertidal to 5,000 metres 16,000 ft; 2,700 fathoms.[1] Their tests hard shells are round and spiny, typically from 3 to 10 cm 1 to 4 in across. Sea urchins move slowly, crawling with their tube feet, and sometimes pushing themselves with their spines. They feed primarily on algae but also eat slow-moving or sessile animals. Their predators include sea otters, starfish, wolf eels, and triggerfish.
圖片編號:
130384042
拍攝者:
Mpet76
點數下載
授權類型 | 尺寸 | 像素 | 格式 | 點數 | |
---|---|---|---|---|---|
標準授權 | XS | 480 x 360 | JPG | 13 | |
標準授權 | S | 800 x 600 | JPG | 15 | |
標準授權 | M | 2000 x 1500 | JPG | 18 | |
標準授權 | L | 2581 x 1936 | JPG | 20 | |
標準授權 | XL | 3648 x 2736 | JPG | 22 | |
標準授權 | MAX | 4000 x 3000 | JPG | 23 | |
標準授權 | TIFF | 5159 x 3869 | TIF | 39 | |
進階授權 | WEL | 4000 x 3000 | JPG | 88 | |
進階授權 | PEL | 4000 x 3000 | JPG | 88 | |
進階授權 | UEL | 4000 x 3000 | JPG | 88 |
XS
S
M
L
XL
MAX
TIFF
WEL
PEL
UEL
標準授權 | 480 x 360 px | JPG | 13 點 |
標準授權 | 800 x 600 px | JPG | 15 點 |
標準授權 | 2000 x 1500 px | JPG | 18 點 |
標準授權 | 2581 x 1936 px | JPG | 20 點 |
標準授權 | 3648 x 2736 px | JPG | 22 點 |
標準授權 | 4000 x 3000 px | JPG | 23 點 |
標準授權 | 5159 x 3869 px | TIF | 39 點 |
進階授權 | 4000 x 3000 px | JPG | 88 點 |
進階授權 | 4000 x 3000 px | JPG | 88 點 |
進階授權 | 4000 x 3000 px | JPG | 88 點 |