mangroves, polychaetes are the main group of true segmented worms.
These worms usually have modified "false feet" on which are attached
hairs which are used for movement.
Most of the free-living species are carnivores or scavengers. There
are also many sedentary species which build mucus tubes and filter
There are many species of sedentary tube worms in mangroves. These
have highly modified feathery structures on their heads which they
use for filter feeding, tapping the rich organic soup of the incoming
The Gregarious tube worm (Capitella
sp., Family Capitellidae, 4-5 mm) is very common and mats of them
appear like hairy rugs on the mud.
The larger Solitary tube worm
(Diopatra neapolitana, Family Eunicidae, 8-10 cm) also occurs
in the softer mud and may be found with Capitella. Both species
build mucus tubes which are covered with mud. Diopatra, however,
also adorns its tube with debris of all sorts.
The Keelworm (Pomatoleios sp.,
Family Serpulidae, 2-3cm) builds tubes of calcium carbonate on
hard substrates and even has a small "door" which can use
to close the opening!
to aquatic invertebrates
Mudflat covered with tube worms