What's known about genes of modern comb jellies
(SN: 5/13/13, p.
In a test run off the coast of Florida this spring, The Associated Press documented how his team is studying which genes switch on and off as iridescent comb jellies
regenerate from injury.
possess muscle cells, but the analysis of the Mnemiopsis genome showed that comb jellies
lack the vast majority of genes that specify muscle types in most other animals.
There were about 400 comb jellies
per cubic meter (that's like 200 golf ball--sized jellies in a space as big as a bathtub).
Ryan and his colleagues questioned this scenario at a meeting in January when they announced that comb jellies
may descend from an ancestor that evolved before sponges.
Though jellies lack eyes, Haddock and his colleagues have discovered proteins that comb jellies
use to sense light.
living in the central Baltic Sea are a bunch of babies.
This specimen from the Arctic is probably a new species of comb jelly, (Unlike true jellyfish, in the phylum Cnidaria, comb jellies
don't have stinging cells.
Some scientists have suggested that comb jellies
, not sponges, were the first multicellular animals (SN: 4/5/08, p.
Now a team of biologists suggests demoting sponges and placing comb jellies
at the base of a new tree of animal life.
For example, one cruise in the Arctic doubled the known diversity of comb jellies
there, from 5 species to 10.
On the other hand, Breitberg has found that the Bay's gelatinous species--its comb jellies
(Mnemiopsis leidyi) and stinging sea nettles (Chrysaora quinquecirrha)--are quite tolerant of hypoxia.