Quiz – the Amphibian Edition

1) animals that have gills in the juvenile form and lungs in the adult form
2) some are, I think – cane toad springs to mind (not poisonous to hold normally but if you irritate him he will excrete some nasty toxins, hence all our native wildlife dying off :/ or poison arrow frogs from South America that natives use to, strangely enough, coat poison from them on their arrows)
3) from memory, some amphibians can change gender if required. also I vaguely remember reading something about newts or some other amphibian being able to regenerate body parts?
4) I believe there is a frog that can be as large as a house cat
5) looks like an axolotl! hurrah for mexican walking fish!

sorry if you didn’t want answers in the comments!