Possible Clues:

• Bob¿s below the waves as medic fit to be tied with web
• Controversial fishing method criticised for its impact on endangered species
• Item used to catch fish
• Current-carried fish catcher
• Fishing gear that floats with the current
• Move from place to place much the same as 5 down employed in the fishing industry
• Catcher left free to watch from below, catching a break
• Anagram of 9dn? There's a catch there!
• Fisherman's aid that floats with the current
• One's out to take catch, meaning the rest of the team's standing back