The infinite variety: the beginning of life



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Leidy's comb jelly was introduced to the Black Sea in the early 1980s from the United States. The absence of competitors and predators allowed this ctenophore to flourish with a total biomass of about 1,000,000,000 tons. As a result of the huge amount of food consumed by the exploding comb jelly population, many fish fry starved. Along with over-fishing and pollution, the introduction of Leidy's comb jelly has been cited as an important factor in the collapse of commercial fisheries in the Black Sea in the 1990's.

Image source:

http://www.enature.com/fieldguides/detail.asp?recnum=SC0127



A Jellyfish that has turned itself upside down

Image Source

http://www.bio.umass.edu/biology/troptrip2/Fish.html



An orange Hydra

Image Source

http://www.eeob.iastate.edu/faculty/DrewesC/htdocs/invert-thumbs.htm

Comb jellies



Comb jellies



Scientific classification

Kingdom:


Animalia

Phylum:


Ctenophora
Eschscholtz, 1829

Classes
Tentaculata
Nuda
scrolling

Sea Gooseberries



Sea Gooseberries



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