Cigar Pteropod and Multi-armed Mystery

Change of pace from whales...a couple of small critters I encountered while blackwater diving in Palau last year.

The first is probably a swimming mollusc known as a cigar pteropod (Cuvierina columnella), which was around 1cm in size (Thanks Leslie!):

Cuvierina columnella, cigar pteropod, palau
Probably a cigar pteropod (Cuvierina columnella) (License image)

And the second...well, I don't know. I think it's some sort of Cnidarian polyp, but that's just a guess based on the general appearance of the gelatinous, multi-appendaged body with mouth in the middle, once again something around 1cm +/- in size.

larva of tube anemone, blackwater diving, Palau
Some sort of gelatinous thing Larva of tube anemone, with lots of arms and a mouth in the middle

If you happen to be a Cnidarian specialist and can ID this interesting little critter, please let me know!

There are just so many fascinating forms of life in the ocean.

[Update 10 Feb: Looks like it's the larva of a tube anemone. See this discussion from the Smithsonian National Museum of Natural History for more information. ID and link via Allen Collins. Thanks Allen!]