鶴咀具有很高的生物學和地質價值，它是香港岩岸生態的例子之一。鶴咀暴露的主要岩石類型是大約在1.64億年前形成的粗火山灰晶屑凝灰岩和花崗閃長岩以及許多流紋岩和鎂鐵質的岩脈。鶴咀有各種沿海地貌，包括吹蝕穴丶海蝕洞丶海崖丶海拱和海蝕平台。它們主要因盛行風和波浪作用的侵蝕而成。鶴咀沿岸的動植物區系十分豐富，在潮汐和波浪的影響下，在裸露的岩岸上均能看見典型的成帶現象。鶴咀的自然生境為生物多樣性及其於惡劣環境下的適應性提供了寶貴的研究機會。香港大學已在鶴咀建立了太古海洋科學研究所，作為海洋研究基地。研究所提供相關設備，幫助香港海洋生物學家著手不同的國際科研項目。因此，保護當地沿海環境以進行科研和教育工作，尤其重要。

The site is of high biological and geological interest. It is one of the best examples of rocky shores in Hong Kong. The major rock types exposed at Cape D'Aguilar are coarse ash crystal tuff and granodiorite, both of which were formed at about 164 million years ago, and a number of rhyolite and mafic dykes.
Various coastal landforms, including blowhole, sea cave, sea cliff, sea arch and wave-cut platform, are present at the site. They are formed by the erosional actions of prevailing wing and wave on the underlying rocks.
The coastal flora and fauna of the site are rich and their zonations are typical of those found in exposed rocky shores under the influence of tides and wave. This natural habitat provides valuable opportunities for educational studies and scientific reserach on the diversity of animals and plants living in such habitat and their adaptations to harsh environment resulted from wave and tidal actions.
The University of Hong Kong has established the Swire Institute of Marine Science at Cape D'Aguilar to serve as a base for marine research. The Institute also provide facilities for international projects on the study of marine biology of Hong Kong. Thus it is important to conserve this coastal habitat for scientific research and educational studies.