CLASSIFICATION OF CESTUM
It is found in the Mediterranean Sea, occasionally brought to the Gulf-Stream and New England coast.
HABIT AND HABITAT
Cestum is a marine solitary and bioluminescent ctenophore
GENERAL CHARACTERSTICS OF CESTUM
- Commonly called as ‘Venus belt’ or girdle of venus among the comb-jellies.
- Process of transverse compression is found to such an extent that the body is elongated in the sagittal plane to a flattened transparent, gelatinous band, measuring approximately 1.5 meters in length.
- Transparent body shimmers with violet, blue or green colour.
- Four sub-tentacular comb rows are elongated to run along the entire aboral edge of the band-like body. Tentacles are reduced to tufts of filaments.
- Small lateral tentacles line the oral edge.
- Four interradial meridional canals arise directly from the stomach.
- Mouth is found in the mid-oral edge and statocyst on aboral edge. Sub-tentacular meridional canal and pharyngeal canals are present.
- Animal swims by the graceful, muscular undulations of the body and by the beating of comb or swimming plates. Sub-sagittal canals accompany the corresponding comb rows along the entire aboral.
The specimen contains girdle-shaped body comb jaws and all above character and hence it is Cestum.