ANIMALS - Jellyfish may be the most energy-efficient animals in the world

Jellyfish are known for their ability to take over ecosystems, even though they're less efficient swimmers and hunters than their fishy competition. But a new study shows that jellyfish may rule the waves by actually being the most energy-efficient animals in the world. Here's how.Read more.. ...

http://io9.com/the-secret-to-the-jellyfishs-ecosystem-conquering-succ-