Need suggestions on How to add detail to sea fans on a reef

[skj]

I have been trying to build a mosaic of a 120m2 reef area.  The model has picked up the hardbottom topography really well but has lost a substantial amount of detail of the softer sea fans, algae, etc which I really need for identification.  I used the following settings for each step of the workflow:
1.  Alignment-high, generic, 40000 key point 1000 tie limit
2. Dense cloud-high, mild
3. Mesh-adaptive, dense cloud, Medium, interpolation enabled
4. Texture-adaptive ortho, mosaic, 8192 size

Does anyone have suggestions on how to increase the detail? 

[chrisd]

Is there any chance that the objects you need to capture have moved, even slightly between images?