Phylum Echinodermata Basic features

1
Phylum EchinodermataBasic features

• Calcareous internal skeleton
• Water vascular system (controls tube feet)
• Pentamerous symmetry (adults)/bilateral symmetry
  (larvae)
• Mutable connective tissue

2
Class Asteroidea (sea stars)

• Feeding
• Respiration
• Protection

Pycnopodia helianthoides
Pisaster ochraceus
3
Class Ophioroidea(Brittle stars, basket stars)

• Feeding
• Respiration
• Protection

4
Class Echinoidea (urchins and relatives)

• Feeding
• Respiration
• Protection

Strongylocentrotus franciscanus
Strongylocentrotus purpuratus
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Class Holothuroidea (sea cucumbers)

• Feeding
• Respiration
• Protection

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Class Crinoidea(Sea lilies or feather stars)
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Phylum ChordataSubphylum Urochordata

• Our closest invertebrate relatives are slimy sacs
  that pump seawater

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Class Ascidacea (tunicates)
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Family Cottidae sculpins
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Family Gobiesocidae clingfish
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Family Pholidae gunnels
Photo Pelagia Scuba
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Family Hexagrammidae (lingcods and greenlings)