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Phylum Ctenophora

Phylum Ctenophora. (Comb Jellies) Kingdom: Animalia Phylum: Ctenophora Class: Tentaculata, Nuda. General Information. Over 100 different species Live in warm water and cold water all around the world They consume fish, larvae and plankton Usually travel in groups or swarms. Anatomy.

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Phylum Ctenophora

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  1. Phylum Ctenophora (Comb Jellies) Kingdom: Animalia Phylum: Ctenophora Class: Tentaculata, Nuda

  2. General Information • Over 100 different species • Live in warm water and cold water all around the world • They consume fish, larvae and plankton • Usually travel in groups or swarms

  3. Anatomy • Round, dome shaped bodies • Sizes range from a few millimeters to a few meters long • Have 8 rows of ciliary combs (little hair projections all along the body)

  4. Anatomy Continued… • Ctenophores have no brain or central nervous system • They have a nerve net that is located around the mouth and is thickest near important organs like the comb rows, pharynx, and the tentacles (if present)

  5. Reproduction • Most adults can regenerate tissue that is damaged or removed • Almost all species are hermaphroditic (male and female) • Most species lay eggs

  6. Eating and Excretion • Prey is swallowed, and then broken down by enzymes. • Muscle contractions move nutrients through the body and expels waste. • Has anal pores to remove waste, but most unwanted waste is thrown up.

  7. Tentaculata • Long, contractile tentacles • Most are luminescent • Tentacles have rows of cilia, that make up the ciliary combs

  8. Examples of Tentaculata • Sea Gooseberries: 4 inches long • Venus’ Girdle: Ribbon like tentacles up to 3 feet long (tropical water) Sea Gooseberries Venus’ Girdle

  9. Nuda • No Tentacles • Made of an outer epidermis and an inner gastro-dermis (where food is digested) • Large oral cavity that allows them to swallow prey • Feeds on soft bodied swimming animals • Has ciliary combs but no tentacles

  10. Nuda Examples • Mnemiopsis leidyi: 3-5 inches and bell shaped • Beroe gracilis: 30mm and cylindrical shape Beroe gracilis Mnemiopsis leidyi

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