Found on the author's website, uploaded with kind permission from Chris
Leathley.

Author's description of the game:

Another game I wrote for Joanne ;-)
I turned up one day and she was all excited with this idea of a game which
starred a fish, which had to swim around the ocean. After that she didn't have
much idea but it was enough to spark my imagination and we sat down and worked
out a bit of a game plan.

It was quite simple. Freddy would have to pick up bars of gold from the ocean
floor, dodging a variety of bad fish, and take them up to his friend in the
boat. After 16 levels he would have enough money to marry his true love Ariel
the mermaid

After coming home I spent all of my available time over the next 6 weeks,
creating 'The Adventures of Freddy Fish', which I think turned to be a great
kids game

http://members.iinet.net.au/~cleathley/gamehistory.html

Archive:  /home/aminet/aminet_root/doc//game/actio/Freddy_Fish.zip
 Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
--------  ------  ------- ---- ---------- ----- --------  ----
  901120  Defl:N   418351  54% 2017-06-12 09:35 55f29846  freddy_fish.adf
--------          -------  ---                            -------
  901120           418351  54%                            1 file