Fisherman does not fish at all.

[surudoiryu]

I have refilled a depleted fish spot with 2500 fish but the fisherman does not do his work and fish them up. (refilled 2 spots near the fisherman building)

[Sinister-King]

Give it a little while and perhaps they'll find it.

Failing that, contact support :).

[surudoiryu]

I see it they have found it :)