Lesson #8 - Deep-sea Cnidarians POWERPOINT
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Orange Sea Pen Special Functions
Individual polyps each having specialized functions:
• Primary polyp – loses tentacles; forms both colony stalk or rachis,
& bulbous base anchored deep into soft substrate
• Autozooids (secondary polyps) - feeding polyps, armed with
cnidocytes on 8 branching tentacles which form feathery branches;
contain gonads (reproductive glands)
• Siphonozooids – more secondary polyps; force water into & out of
colony
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