One thing I noticed while reviewing the recent dives and those from last year was just how much COLOR you see in the deep-sea.. black, white, ORANGE... and purple!
Purple is of course, the color of kings! In Chinese painting, purple represents the harmony of the universe because it mixes red and blue. There's a whole bunch of meaning which you can find on Wikipedia..
Functional explanations for animals with black, white (such as this Henricia) or transparent/translucent body walls seem to be explained pretty readily by light-related/lack of pigment type explanations.
1. There's this big echinothuriid urchin, Tromikosoma As discussed last week, these walk around on the deep-sea floor with spines modified into walking legs.
The shallow water relatives of these urchins are VERY poisonous and brilliantly colorful! As presented here, a few years ago.
Curiously, another purple echinoderm is this feather star (crinoid), Sarametra triserialis (Zenometridae) as ID by Chuck Messing.
As has been mentioned before, these are big blobby pillow shaped starfish that emit a noxious mucus when annoyed..
AND this handsome soft coral, Clavularia!