This is new Item in Mr.Mine, added on 06/18/2021 in V0.20.
Orange Fish clickable will show up very rarely and give different rewards. (Can be seen on scroll bar with level 5 metal detector). It takes 24 to 48 hours to spawn.
To calculate when Orange Fish will Spawn, reload your game and see the Debug Log, and find above 2 numbers and calculate the difference. (For ex. 143307-110798=32509 sec) That is the time it takes to spawn Orange Fish. This number could be different for every player
it can only spawn in areas below Km 51(ie Km 52 Km 53 Km 54 and below)