| 1 | These cloud formations were seen over the western Aleutian Islands. | |
| 2 | Breeding territory spans half the globe, from Iceland to the Aleutians. | |
| 3 | Green sea urchins, chitons, and sea stars cluster in a tidal pool off Alaska's Aleutian Islands. Sea urchins and sea stars are close relatives. | |
| 4 | Green sea urchins, chitons, and sea stars cluster in a tidal pool off Alaska' s Aleutian Islands. | |
| 5 | Breeding territory spans half the globe, from Iceland to the Aleutians. |