Spider Diffusion Spijkes?

I took out my 15" f/4.9 DOB out last night. I have only owned it for a short time. This is my first DOB and I don't know a lot about observing with one. I have only had SCTs in the past.
I did a lot of looking at Messier objects and NGCs before Mars came up and the views were very good. Others checked it out and said that it had good looking optics. (Swayze Mirror)
When Mars came up I tried to look at it with my 31mm Nagler and I had a very large starburst looking bight spikes in a + pattern. I tried several other Naglers and a couple of Meade UWAs and basically saw the same thing. A filter suppressed them quite a lot. Is this what the diffusion spikes look like when looking through a DOB at a bright object? If not, what else could cause this. The scope was well collimated with a LaserMax collimator. It looked textbook perfect.
These spikes were not apparent at all until I tried to look at Mars. This is the first time I looked at Mars with it.
Any help or suggestions would be appreciated.
Floyd

Yep Floyd, thats what they are. Don't laugh but if you feel like it and the blades on your spider are round or like vanes, you can wrap "or bend" aluminum foil around them to reduce it on planets, somewhat. It helps some of my scopes. Not gone completly but reduced. You just have to try it to see if it works for you. At least it will not hurt the scope and you can take them off if it does not help. The only other choice is a curved spider or different type of scope.

What you are seeing are diffraction spikes from the spider that holds the secondary. They will definitely show up on bright planets and stars, but are too faint to see on fainter stars. While they are not attractive, they don't really detract from what you can see on Mars.