Description DOER Sea Mantis 5 is a robust & effective tool for use on inspection and light work class ROVs or submersibles. Shown here with multipurpose jaws. Heavy duty cutters, parallel closure and custom end effectors are also available. Fully capable with a wide range of motion and 360 degree continuous wrist rotate, Sea Mantis stows neatly for launch and recovery. Smooth, steady proportional control is provided via a standard computer and USB joystick.