Heres my Grundhai in 1/72 by Schatton Modelbau.
This was a project that didnt make it off the drawing board for a DSV its planned operating depth was 1000m, It was designed for underwater recovery and other tasks including cutting underwater telephone cables.
Its a simple resin/metal kit which needed a little clean up, painted in humbrol enamels and given a satin coat finish.
Having looked at the photos, close up the camera picks up every little thing, groan. In person it looks fine, its about the size of my thumb.
Drat i seem to have lost a prop blade on the starboard side, scalpel nurse.
All the best Chris