Why so many Barnacles

[finefurn]

I just pulled the boat for the season. The boat was moored in the Piscataqua river at Great Bay Marine in Newington NH. When it came out of the water, I didn't see anything unusual, except for the prop shaft. There was an unusually large cluster of barnacles where the prop shaft exits the hull and for about 16" aft. Every year I usually have a few barnacles scattered on the hull but never such a large group of them in one place. Any ideas as to why ? What is the best way to remove such a large group and clean the shaft ? Another thing, which may or may not be related, but my zinc anode was severely eroded this time, much more than previous years
I looked around the marina at other boats that were hauled and none of them had this sort of thing. Any ideas.

[a64pilot]

Your prop shaft isn’t anti fouled.
Instead of worrying how fouled your shaft is, you should be very happy about how clean the hull is, yes I know it was pressure washed, but it wasn’t barnacle covered.

I would guess your boat did a lot of sitting?