What do nudibranchs look like?

There is no one form for nudibranchs other than that they are generally fairly oblong.  While the word slug often brings to mind the slimy grey creatures that may be crawling through the back garden, the nudibranch are jelly-like creatures that can be flat and long or thick and short or anything in between.  While they can be dull in color, they are generally brightly colored and the variety of colors is astounding as is the variety of patterns that nudibranchs display.  Nudibranchs also have at least a few tentacles protruding from their heads and can have just a few other tentacles on the body or can be completely covered in them.