Bones, you guys have to be licensed to do stuff like that down under?
Well yes.
You can't keep a reptile or amphibian without a licence. I think some native fish also fall under these laws.
For children, you are allowed to collect tadpoles for educational purposes but they must be released back into the area they were captured before their metamorphosis is complete.
Legally, you can not buy or trade such animals without a licence and your records have to be accurate to account for births, deaths and trades. You can not keep an animal you find. Audits can be conducted without notice into your records and collection. Fines for offenses are pretty bloody steep.
The initial licence is incredibly easy to get. It only requires an official application and small processing fee. This allows a list of amphibians and reptiles to be kept whose care is minimum (and natural population is strong).
Once a person has demonstrated they have what it takes, they can apply and may be granted further licences that permit the keeping of a broader range of selected species.
I don't think the system is a bad one. It is there to protect wildlife and educate people. From memory, things such as spiders and scorpions also fall under similar laws. We take our environment and especially our wildlife pretty seriously over here.
Without a licence we can still enjoy a large range of fish and some oddities like a axolotls & yabbies.