Phylum: Ctenophores Nathalie Musey Period 2
Ctenophores (comb jellies) are flexible sea creatures seeking to please others. Transparent, mostly un-pigmented, and only 2 cell layers thick, ctenophores aren’t fussy about looks. Don’t let their small size fool you! Ctenophores are excellent swimmers and their bioluminescence puts on quite a show!
Ctenophores can be found in varying marine environments worldwide, from tropical to polar and coastal to ocenic
Ctenophores enjoy taking long swims, beating their cilia in regular pattern, in the evenings allowing them to display their bioluminescence
They also enjoy fine meals ranging from microscopic larvae and plankton to small crustaceans
Little is known about the biological and ancestral origins of the ctenophores
Recent fossil findings differ from living ctenophores, making it difficult to create phylogenetic affinities.
Specialized Structures 8 “comb rows” of fused cilia along the sides of the animal Sticky cells, colloblasts, to capture prey Few species have special mouth cilia used for biting gelatinous prey Bottom living (benthic) ctenophores are brightly pigmented, usually reflecting the color of their substrate
Balance receptor, the statocyst, helps maintain upright positioning when needed
Seeking: Hermaphrodite ctenophore that is well adapted to deep sea environment, can swim quickly and capture food effectively Enjoys: Look swims at night
Prefers: bright bioluminescence and red pigmentation
Bibliography Anisimmov, Michael. "What is a Ctenophore?" 19 Apr. 2009 <http://www.wisegeek.com/what-is-a-ctenophore.htm>. Special adaptaions (balance receptors) Collins, Allen. "Introduction to the Ctenophora." UCMP - University of California Museum of Paleontology . 19 Apr. 2009 <http://www.ucmp.berkeley.edu/cnidaria/ctenophora.html>. "ctenophore." Encyclopædia Britannica . 2009. Encyclopædia Britannica Online. 19 Apr. 2009 <http://www.britannica.com/EBchecked/topic/145454/ctenophore>. Basic anatomy and life cycle Mills, C. E. "Ctenophores." June 2001. 19 Apr. 2009.
Habitat, diet, sex/life cycle