Fire crews at Langwarrin in Melbourne, Australia got to save a tiny life recently.
Here's the story:
A koala was hit by a car and took refuge in a tree.
When they went to rescue the little critter...
The sneaky cuckoo catfish has adapted an ingenious way to make sure its young survive.
There is a fish called the cichlid, and as a mother, it protects its babies by keeping them in its mouth.
See what happens when the cuckoo sneaks its young into the cichlid mother's mouth.