Basic Problem With Mesh Types

I’m browsing docs for the first time. I see that there are two basic types of meshes: “Static Mesh” and “Skeletal Mesh”. My question:

What kind of mesh is used for something like 3D water (with 3D waves)?

Certainly it can’t be Static Mesh, since you need vertex shader animations. Certainly it’s not Skeletal Mesh, since water has no bone interpolation.

Static Mesh Morph Targets.