How can i mesh this? Picture included
 

Hey people,

please help me out to generate a mesh which is similar to this. i dont know the method or commands how to achieve a mesh similar to the one attached in the file.

The idea:
- a body in waves
- close to the body a very fine tetra mesh, like a bubble around (from coarse to fine in body direction)
- in the wave area a hexa mesh, like a box (except close to the body, here fine tetra mesh preferred)
- above and under wave area a tetra mesh, with more distance to the body the more coarse the mash can be

I dont know with which commands i can make this different areas and how to proceed.

Attachment 38222

Attachment 38223