Colony compact,tubular,phosphorescent in life
Zooids embedded in a common test..
Muscle bands confined to body ends
Gill-slits tall, numerous to 50.
Absent of larval stage.e.g pyrosoma..
Zooids embedded in a common test..
Muscle bands confined to body ends
Gill-slits tall, numerous to 50.
Absent of larval stage.e.g pyrosoma..
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