Noun
anything that gradually gets smaller from a circular section to a point
Kaihalulu Beach is one of a very few red beaches in the world. The sand gets its brilliant color from the iron-rich cinder cone hills surrounding the bay.
Verb
control and make use of (natural resources), especially to produce energy
The new Ocean Health Index is meant to give countries a quantitative measure of how well they harness and maintain the benefits of their coastal territories.
Noun
ridge of jagged rock, coral, or sand just above or below the surface of the sea
This extraordinary artificial reef (MUSA) off the east coast of Mexico is made of life-casts of real people constructed from materials which encourage coral to grow.
seaboard
Google is making a huge investment in a massive off-shore cable that would eventually carry power from off-shore wind farms to cities along the Atlantic seaboard.