Mertensia ovum

Taxon-Order: 

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Distribution: 
Alaska to Mexico
Habitat: 
Planktonic, near shore.
Size: 
Up to 15 mm.
Diet: 
Copepods, larval fish, various types of eggs, and small crustaceans.
Predators: 
Sea turtles, fish, other ctenophores.
Useful Facts or Characters: 

It is not a jellyfish. Transparent body; the body shape is oblong to spherical and slightly flattened.

Natural History: 

Seasonally one of the important predators of zooplankton in California waters; common in aggregations.