Pink ducks on display

[mlaver]

I have an e97 running Navionics charts with Lighthouse II, 15.59. In some areas there are a high concentration of pink duck-like marks on the display that, according to Navionics, represent "different types of marine sanctuaries or estuary area zones/nature reserve areas." The problem is, these ducks clutter already busy charts, and to make matters worse the e97's radar returns are also pink. It's very hard to distinguish ducks from blips.

There are two questions: 1) Can the marine sanctuary "layer" of the chart be turned off or alternatively 2) can the radar return color be changed to something other than pink?