If only I could remember names (think of it as a game :P )

Hey you guys..
So I am looking at getting a new pet, and I have a free tank that I would love to use, I remember reading about this one (I hope you can call it a fish) on this forum that lives in and outside of water..
I remember thinking it looked kinda like a frog?
Also I remember people saying that it mustn't have very deep water, and it must have more place for it to be on land then off..
If anyone can tell me what fish(?) this is from my very vague discription I'd be very impressed. But please, it will be very cool

thats exactly it!!!
Well done you win!
Thank you soooo much, you have no idea how much that has been annoying me!!
Any websites or sugestions about how to keep one?