u/BoysenberryOk3654

Hey im searching for a movie that i‘ve seen as a kid.
I can only remember that it played after or during a catastrophic flood and it was set on a house boat or something on the ocean, when at sometime in the movie the animals on the boat rescued a tortoise. Then the tortoise became the villain somehow and all i remember that it laid down her shell.
It was a super dramatic kids movie like they aren’t made anymore, so i‘d be very happy if you could help me find it again.