Estimate how much taxi fee from Admiralty to Hong Kong Ocean Park ?

It would cost around 70 HKD per person.

You mean HKD70 per person taxi fee from Admiralty to Ocean Park ?? How come the fee is per person ?? Per taxi can take 4 person right ??
I saw your reply on 29SEP2016, mentioned about 80-90 HKD in usual time from Ocean Park to Eaton Hotel Kowloon.
Eaton hotel is more far away from Admiralty to Ocean Park right ??

Need your help to check !!

Oh, I am sorry that I made a mistake. It should be it would cost around HKD 70 per taxi. Each taxi can hold five passengers at most.

Eaton Hotel is farther, and the taxi fare is around HKD 80 to 90. :)