Good point cloud but bad models, help for generate accurate mesh

[Daniele]

Hello guys,
after several trials I decided to ask for a suggestion here since I struggling with the reconstruction of complex underwater organisms, namely gorgonians (seafan).
After masking the original imagery to remove the blue background, I get I very nice point cloud after manul editing and cleaning (see attached photo). However, I was not able to generate a good mesh model using such point cloud even if I disabled interpolation and used high face counts. Using also depth maps even after ultra high qualiity generation settings did not satisfy me. Do you have some Ideas to improve my results?

Many thanks in advance.

All the best,
Daniele