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7. Phylum Ctenophora
The Comb Jellies-be gentle & put them in a container to
see them, so you don’t hurt them
Information
• Zooplankton• All marine (no freshwater species)• Transparent, globe or egg shaped jellies• Similar to but are not considered jellyfish
Anatomy
http://www.youtube.com/watch?v=G7WT81ukHZE• Radial Symmetry• Up to a few cm (about 4 inches) long• 8 rows or bands of cilia combs that the jelly beats
together to help it move, flashing while it goes• Body is >95% water• Body is only 2 cells deep with an open center• No stingers
Feeding
• http://www.youtube.com/watch?v=1xkNPp6mzzI• Voracious predators (up to 10 x their weight/day) • Sticky tentacles called colloblasts help capture
zooplankton• Important predator of copepods and fish larvae• Delicious to sea turtles
Reproduction
• Hermaphrodites• External fertilization and development• Larvae are planktonic