This pattern comes with instructions to make any of FOUR different, distinctive, beautiful Nudibranches aka Sea Slugs!! You can make a Hypselodoris bullocki, a Dirona albolineata, a Ardeadoris cruenta, or a Glaucus atlanticus!!! Everything you see crocheted in the photos is included in the pattern. All instructions are carefully depicted with words and photos! This pattern features clear step by step instruction with a lot of row-by-row photos. The gauge is not crucial to the pattern so long as you are consistent throughout.