The shots you took were really amazing. I find it more amazing on this odd looking creature that seems to be a spider on water or is it a type of crab? :D The sea pen by the way looks like a feather pen that people in the colonial era in the Philippines use and even today (those who love making calligraphy artworks).
I have fears in diving so I guess I will only be able to see these creatures in photos. I must conquer my fear then! yay! Good job and I am glad you had fun.