terjawab sudah,
Feather duster worms will build their own tube to live
in. It's beautiful feather duster crown is attached to
it's face and it extends it out of the tube to filter feed.
There are many different types from the small hard
calcium tubed beauties you find on live rock to the
giant Hawaiian Feather Duster. These are stripped
medium sized and most appropriate in a refugium.
The average adult's crown gets about as big as a
quarter.