The document discusses the phylum Annelida, class Polychaeta. Polychaetes, also known as bristle worms, are segmented worms that live in a variety of marine habitats like the ocean floor, under rocks and shells, or in coral reef crevices. They have appendages called setae or parapodia that function as paddles. While some polychaetes are free-swimming predators or scavengers, others like tube worms live sessile in self-made tubes attached to surfaces. Tube worms extend feathery gills and radioles from their tubes to create water currents for filter feeding.

1. Phylum: AnnelidaPhylum: Annelida
Class: PolychaetaClass: Polychaeta
By Mr. “I have hair” ChapmanBy Mr. “I have hair” Chapman

2. Class: PolychaetaClass: Polychaeta
 PolyPoly
– manymany
 ChaiteChaite
– hairhair
 Many hair animalsMany hair animals

3. Class: PolychaetaClass: Polychaeta
 Live in a variety ofLive in a variety of
habitatshabitats
– Ocean floorOcean floor
– Under rocks andUnder rocks and
shellsshells
– Crevices of coralCrevices of coral
reefsreefs

4. Polychaeta DigestionPolychaeta Digestion
 Free swimming polychaetes areFree swimming polychaetes are
predators, scavenger, and filterpredators, scavenger, and filter
feeders.feeders.

6. AnnelidsAnnelids
 Earthworms and polychaetes haveEarthworms and polychaetes have
appendages growing from each ofappendages growing from each of
the annuli calledthe annuli called
 SetaeSetae

7. PolychaetesPolychaetes
 On someOn some
polychaetes thepolychaetes the
(setae) are longer(setae) are longer
and are calledand are called
parapodiaparapodia and areand are
used as paddles.used as paddles.
 Parapodia are theirParapodia are their
most distinctivemost distinctive
featurefeature

8. PolychaetesPolychaetes
 Tube worms are an example of marineTube worms are an example of marine
species that do not have paddle-likespecies that do not have paddle-like
appendages.appendages.

9. PolychaetesPolychaetes
 Another example are Feather DustersAnother example are Feather Dusters

10. PolychaetesPolychaetes
 Another example are Christmas Tree WormsAnother example are Christmas Tree Worms

11. PolychaetesPolychaetes
 They burrow into the bottom asThey burrow into the bottom as
larvae, but as they grow, they makelarvae, but as they grow, they make
a tube, which serves as a burrow.a tube, which serves as a burrow.

12. PolychaetesPolychaetes
 However the tubeHowever the tube
is above the seais above the sea
floor.floor.
 They have setae toThey have setae to
hold themselves inhold themselves in
their tube.their tube.

14. Tube WormsTube Worms
 Tube is made ofTube is made of
sand, gravel andsand, gravel and
bits of shells thatbits of shells that
stick to the worm’sstick to the worm’s
slime. It allslime. It all
becomes tough andbecomes tough and
leathery.leathery.

15. Tube WormsTube Worms
 Feathery gillsFeathery gills
surround thesurround the
mouth.mouth.
 They form aThey form a
funnel-shaped fanfunnel-shaped fan
covered with ciliacovered with cilia
called Radiolescalled Radioles

16. Tube WormsTube Worms
 This creates aThis creates a
feeding currentfeeding current
that draws in food.that draws in food.
 Food is anythingFood is anything
that is organic andthat is organic and
digestable.digestable.