atoll

US /ˈæt.ɑːl/
UK /ˈæt.ɑːl/
"atoll" picture
1.

atolón

a ring-shaped coral reef or island or a string of coral islands enclosing a shallow lagoon

:
The divers explored the vibrant marine life around the atoll.
Los buzos exploraron la vibrante vida marina alrededor del atolón.
Many Pacific islands are formed by atolls.
Muchas islas del Pacífico están formadas por atolones.