communication between Arduino and pc over long distance, must be through wire

Using Arduino Networking, Protocols, and Devices
#1

It has to be a wire because it's for underwater, 100-150m. I need to receive live video and send controls to motors.

What are my options?

#2

Why have you opened a new Thread for the same project? Double posting just wastes time. Keep all the info in one place.

I am suggesting that the Moderator merges them.

...R

#3