I designed a cutting claw with integrated recessed blade for cutting vegetation, ropes and small wire with the underwater QYSEA FIFISH ROV + Robotic Arm. I don't have yet an underwater drone but they amazed me. Will get a FIFISH soon!

Here is my contribution to the community:

DIN7981 tapping screws
2x d 2.9mm x L 13mm
1x d 2.2mm x L 13mm
1x trapezoid blade 52mm x 19mm x 0.5mm

I printed the claw with Prusament PETG, 100% infill, 0.3mm layer height in DRAFT mode. No supports needed. Depending on your filament and settings you might need to use a small nail-file on the notch of the "cutting_claw_notch.3mf". Clean it up a little bit so the blade can enter the notch.

Caution: Be careful and avoid cutting your ROV tether cable ;-)