Hoi Sham Park is near my living place, To Kwa Wan. Here is the description:

Background of Hoi Sham Park
The former site of Hoi Sham Park had a Hoi Sham Temple. The park was surrounded by jagged rocks, among which the tail fin rocks look exactly like a fish's tail. Viewing from a far, the two huge rocks feature the head of the fish against its tail, posing as "a carp jumping across the Dragon gate" in traditional drawings. Facing Lei Yu Mun, the rocks bear excellent fung-shui.

When the government underwent an extensive reclamation project along the coastal area of To Kwa Wan between 1962 and 1970, Hoi Sham Temple was relocated next to the Tin Hau Temple at Lok Shan Road, To Kwan Wan. This resite temple has now become the Long Mu (Dragon's Mother) Hoi Sham Temple.

Upon the completion of the reclamation project, Hong Kong Jockey Club gave a grant for the development of Hoi Sham Park so as to provide a sitting-out area for the public. The tail fin rocks and most of other jagged rocks have been retained for visitors' enjoyment. A couplet has been put up on the pillars of Hoi Sham Pavilion, bearing the meaning that "Hoi Sham Pavilion captures the beauty of West Lake; tail fin rocks preserve the sanctity of the place".

In Chinese：海心公園背景歷史
海心公園原址有一座海心廟，四周怪石嶙峋，其中以魚尾石最形神肖，倘若從遠處眺看，兩塊巨岩仿如魚頭魚尾互峙，活像畫家筆下「鯉躍龍門」的形態，遙對鯉魚門，風水尤佳。在1962至1970年期間，政府在土瓜灣沿海進行大型填海工程，便將當時的海心廟遷徙到現時土瓜灣落山道天后古廟的旁邊，即現時龍母海心廟。填海工程完竣後，於1972年由香港賽馬會撥款興建海心公園，開放給市民作消閒休憩之用，並保留魚尾石及大部份奇怪岩心供給遊人觀賞，同時在海心亭楹聯題曰：

「海心亭具西湖韻　魚尾石全此地靈」