I am making an an aquarium but the thing is I dont know how to animate any tips on doing it
There is a built in animation editor in the Roblox Studio. Try using it, very simple to use, if you know how to animatine GIFs and stuff, it should be easy.
it says i need to select a rig so am i not able to animate a whale?
It’s a saying, Do you see the light? Means do you get the thing you didn’t know how to do now.
The rig is the thing you are trying to animate. Click on the whale and tell me if you can move his parts and animate him.
Is the whale a MeshPart? You can’t properly animate a Mesh without using bones and a full rig.
Also, bones aren’t even finished. You might have to make your own whale with parts.
What Jumbo means is that you can make your whale into a rig. This is an article about making custom rigs. You probably already know how to animate and this article explains how to add parts to a rig. I recommend searching some articles on custom rigs. Good luck!