I have to make the gefilte fish for 25 at Passover. We live in South Florida and caught dolphin (mahi-mahi) and tuna fishing yesterday. These fish are much fresher than what will be in my market but worried about the texture. Maybe add some fresh water fish to the mix? I can easier buy snapper (or tilapia-yuch). Should I mix fish, anyone tried making gefilte fish with salt water fish?