Did I get a coco worm by mistake?

[MoshJosh]

So one of the first critters I wanted to put in my nano tank (5 gallon) was a feather duster worm. . . I think they are super cool and my reading said they are pretty easy to take care of. . . my local fish store sold me a "dwarf feather duster" that looks pretty darn cool. . . but now I'm sort of wondering if I didn't get a coco worm by mistake. My understanding is coco worms are more delicate and more difficult to care for. . .

The crown of my worm is bifurcated (hope that's the correct term)/it has 2 crowns. the crowns form sort of spirals. color is white and pink.

You can only see the one crown in the photo, but there are 2:

 

[homer1475]

Looks like one to me, hard to tell from just the crown though. If the tube is hard, and not leathery, it's a coco worm.

 

[MoshJosh]

Yeah the tube is hard/rock like.

 

[MoshJosh]

So is there any differences in care vs normal feather duster? I feed it 1-2 times a day with phytoplankton (using a pipet) and broadcast feed 1 time a day. I assume my calcium needs to be on point too. . . which according to my last test it is OK.