sea squirts: urochordata related to amphioxus and cephalochordata
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Sea squirts: Urochordata related to amphioxus and cephalochordata. Diagram by Woods Hole Oceanographic Institution Hole. Filter feeding in annelids: sabellid worms. Arenicola : lugworm Polychaete Annelida. Tail toward head shaft - PowerPoint PPT Presentation
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Sea squirts: Urochordata related to amphioxus and cephalochordata
Diagram by Woods Hole Oceanographic Institution Hole
Filter feeding in annelids: sabellid worms
Arenicola : lugwormPolychaete Annelida
• Tail toward head shaft• Ingests sand rich in micro-
organisms and plankton left by receding tide
• Every 40 min castings of sand• Tide in: stream of water driven
through burrow tail to head direction current gas exchange sweeps away carbon dioxide and nitrogen; body swellings
Commatulid grasping coral head on reef
Commatulidae: feather starspodia originate as filter feeding devices
Swimming in commatulids
Mole crab
Whale shark
Blue whale; baleen
krill
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