Animals

Pogonophora

Also known as bearded worms, these worms are long thin worms which live in hard tubes they have secreted. Included in this group are the deep sea tube worms that grow by underwater vents. They range in length from 5 cm to 3 m.

Above: Modern example

For more information:

http://www.ucmp.berkeley.edu/annelida/pogonophora.html