TOO many animals spawn around my farm on my island

Dear Sir and Madam,

I saw that TOO many animals spawn around my farm in the water.
There is no gap between the fence.
I attached a photo to this issue below.
I think the issue seems to be there since the Beta release so it is nothing new and should be fixed soon because my computer gets laggy of this a bit too if there are unnecessary animals around me in the water and it is a bit annoying.
By the way I have a really big farm on the island.
My friend has the problem too.

I hope this issue is being fixed soon,
thanks for taking care!

Best regards,
Janek P.