From the publisher's website:
In the wild, you must adapt to survive! Will you win by having your Bears Eat Fish? Or will someone change the Goal so that their Frogs and Insects can make Night Music? Play ecology themed Actions and Rules like Scavenger or Composting, but watch out for Creeper cards like Forest Fire, that can hurt everyone! Discover a little about how things go together, with EcoFluxx - the nature game of ever-changing rules!