| In their voyage through the remote islands and atolls they seldom took the boy ashore, fearing infection. |
| Hidden beneath the salty Pacific, the coral atolls along the northwestern Hawaiian chain put an abrupt end to many a daring seafarer's adventure. |
| The northern islands are coral atolls that have formed over ancient sunken volcanoes and are characterized by outer reefs surrounding a lagoon. |
| Communities on the coral atolls are usually concentrated along the leeward shoreline of lagoons. |
| The islands of the Maldives are grouped in ring-shaped coral atolls, each enclosing a relatively shallow lagoon with a flat sandy bottom. |
| The Tuamotus are a group of low-lying atolls that form part of French Polynesia. |
