Invertebrate Diversity
Phylum Ctenophora — Comb Jellies

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Characteristics

• Diploblastic; endoderm & ectoderm separated by mesenchyme
• Biradial symmetry
• Gastrovascular cavity with anal pores
• No alternation of generations; no sessile stage
• 8 combs (rows of ciliary plates)
• Most with pair of long tentacles