Yesterday, I went out and dove the Palos Verdes area here in southern California. Palos Verdes is known nudibranchs. The water here is usually very cold and low viz as well. I did two dives there. I was not able to do the third as I had a leak in my drysuit. The water temp was around 61 degrees. Here is a picture of a Hermissenda crassicornis. This was taken with my Canon 5D3 with a Tamron 60mm Macro lens.