Bristle Worm

doing the weekly water change and unearthed this guy.in the picture he looks rather short compared to when it elongates and i am once again astonished at what goes under the radar of even some of us more involved folks.this one also looks a bit differnt that the worms i am used to seeing.not so much fillament hairs along the sides and one end seems to be adapted for something alse such as digging a burrow.
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not to sure on how many types of bristle worms ther are but i do know there are several.hermodice carunculata is the one most familiar.

damn, i think i have some small ones...
dont arrow crabs feast on them?

the small ones are not usualy the problematic ones but the small will grow.and yes arrow crabs will dine on the little nasties.speaking of arrow crabs i have had one living with my tube anemones for some time and thats pretty cool in my opinion.this bristle worm is a little differnt than the ones i am used to seeing as it lacks the number of bristle that they usualy have.

that arrow crab survived in the bathroom tank?