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I think it's a solitary tunicate - do an image search for Phallusia mammillata. Here's one site http://www.mer-littoral.org/32/phallusia-mammillata.php

It is. The purple body & white stripe belong to Stegopontonia commensalis which is only found on urchins.

Clsoe enough. Serpula columbiana. This one is native to the NEP. It was described from Puget Sound and is much more common than S. vermicularis which appears to be an introduced species.

rotfl......

Could be. I found another paper that lists S. atra for the Mexican caribbean. The name S. pterophylla came from the Humann & DeLoach guide to inverts of the Caribbean. With a little more searching I found that S. pterophylla was transferred into the genus Larsonia - that's why it isn't listed...

Would really need to see a pic of this one, sorry.....

More likely to be Serpula columbiana but I'd need a close up of the operculum to be sure.

Super picture. Class Hydrozoa. Two tentacle hydromedusa Stomotoca pterophylla.

The two likeliest groups of candidates are lugworms (polychaetes, family Arenicolidae) and acorn worms (phylum Hemichordata, class Enteropneusta). Species ingest sand & mud, digest the organic particles & spew forth the clean sediment. Intertidal ones will produce distinctive mounds of coils...

My pleasure :D You should try some night light netting as well. All sorts of swarmers will show up to a bright light especially close to the full moon. They're great fun to watch.

Should be copepods. There are some species of Labidocera and members of the family Pontellidae which are bright cobalt blue and can be extremely abundant in some areas. Not many good pictures show up in a google search. The best is at http://weblog.greenpeace.org/deepsea/archives/2004/06/...

The first is a sea star in the genus Gomophia. The tunicate appears to be a Rhopalea. The nudi eggs can't be assigned to a species based on that picture.

Aeolid, Glaucidae, Phidiana indica.

Leech. Looks like the base of the extended proboscis (feeding organ) at the tip of the head on the left.

It's not sushi if there isn't rice.... :D I think I met Bill once years & years ago and have copies of his worm papers but that's about it. Are you a friend of his?

It's a leech enjoying a nice meal of shark blood.

Er, I'd go with tunicate although I wouldn't be so bold as to specify a genus. That pattern of stellate incurrent siphon openings & a few large excurrent openings is common. Maybe family Didemnidae. Take a look at this...

Take a look at some of the images of Nembrotha purpureolineata on the Sea Slug Forum and you'll see several animals which look just like yours which were identified by Bill Rudman. With all due respect to Neville my preference is to follow Bill if they disagree...

Great site Wyatt - good photos & enjoyable commentary. I enjoyed enjoyed browsing some of the links as well. The one thing I didn't like was the music which quickly became annoying, sorry! The spider crab is a species of Oncinopus. I've seen it labelled as both Oncinopus sp. (which probably...

The first one is a juvenile of Nembrotha purpureolineata. The pygmy is a recently discovered species that's still undescribed as far as I know. The third image doesn't show.