When I was a kid, I used to go to the Queensalnd Museum and marvel. One of my favorite sites was a simple tank, where in lurked speedy the Lungfish. Lungfish are and inprotant link in the evolution of tetrapods such as ourselves. Queensalnd is one of the few places they are found, and the State government there is hell-bent on wiping out their last habitat. Pop over to Pharyngula
for more details, and for how you can help to stop the destruction of their habitat.