Hanauma Bay

Hanauma (/ˌhɑːnəˈuːmə/; Hawaiian: [həˈnɔumə]) is a marine embayment formed within a tuff ring and located along the southeast coast of the Island of Oʻahu in the Hawaii Kai neighborhood of East Honolulu, in the Hawaiian Islands.

Hanauma is one of the most popular tourist destinations on the Island and has suffered somewhat from overuse (at one time accommodating over three million visitors per year). In 1956, dynamite was used to clear portions of the reef to make room for telephone cables linking Hawaii to the west coast of the US.

The word hana means bay in the Hawaiian language (the usual addition of bay in its name is thus redundant). There are two etymological interpretations of the second part of its name. One interpretation derives it from the Hawaiian word for curve, referring to either the shape of the feature or to the shape of the indigenous canoes that were launched there. Another stems from the indigenous hand-wrestling game known as "Uma".

Hanauma is both a Nature Preserve and a Marine Life Conservation District (the first of several established in the State of Hawaiʻi). Reflecting changes in attitude, its name has changed over time from Hanauma Bay Beach Park to Hanauma Bay Nature Preserve. Visitors are required by law to refrain from mistreating marine animals or from touching, walking, or otherwise having contact with coral heads, which appear much like large rocks on the ocean floor (here, mostly seaward of the shallow fringing reef off the beach). It is always recommended to avoid contacting coral or marine rocks as cuts to the skin can result and neglecting such wounds may bring medical problems.

...
Wikipedia