Let’s do one thing, we can make a fish catching submarine powered by a nuclear reactor and hydrogen cell for power. For locating fish we can use graphical image processing, sonar and thermal scanning technology with satellite imaging and fish migration patterns. For communication we can establish a small AM and FM communication tower with extra features like satellite communication and GSM modules. In the bot for remote administration we can use a server rack of military class computers with symmetric parallel processing. For catching fish we have two options either dump the radioactive content from nuclear reactor in the sea or use a hydrogen bomb or chemical weapon to make the catch . What would you say ?