Timer for harpoonfish tiles

[FatClouds]

If possible, could you add timers for the regular harpoonfish tiles like the double ones? would be nice to know when they are depleting. If not able the same timer maybe like a few seconds until it will deplete. Thanks for reading.

[CasvM]

Since the regular fish spots deplete between 34 and 46 seconds it is not accurate enough to add as a timer in my opinion, perhaps I can change the color of the spot based on how many seconds have passed though